Feb 17 2009

Climate Change – The Coming Crisis

Published by admin under Greenhouse Gases

By:  Jonathon Hardcastle

While many contend that there are different reasons behind the changing of our climate, few can deny that our planet is going through a period of immense changes. While some may discredit the science, global warming is one of the main hypothesis for why our planet is heating up. In this article, we’ll try to explain some of the science behind global warming so that you can understand the problem more clearly.

According to numerous scientific studies, our planet’s surface temperature has increased by about 1 degree Fahrenheit within the last century. Most of this change has occurred in the past two decades, prompting the question: are our lifestyles accelerating this global change? The evidence definitely seems to point in that direction.

Many scientists point to the emission of greenhouse gases as one of the leading reasons that we are undergoing this global change. Carbon dioxide, methane, and nitrous oxide are some of the main compounds that we are releasing more and more, causing something known as the ‘Greenhouse Effect’. This occurs due to the fact that these gases tend to trap heat, and when they are released into our upper atmosphere, they trap some of the heat energy that would normally be reflected by our earth’s natural processes.

It’s an undisputed fact that there is more greenhouse gas in our atmosphere due to humanity. Since the beginning of the industrial revolution, it is estimated that the amount of carbon dioxide in the atmosphere has increased by as much as thirty percent. While a little greenhouse gas helps to keep our planet warm, the more and more that we release, the hotter the planet is going to get. That is an important fact to consider, being that our biosphere is finely tuned to live at the temperatures at which our planet currently operates. Many forms of both plant and animal life run the risk of extinction should the temperature change be accelerated. Fossil fuels are primarily responsible for the amount of greenhouse gases that we are releasing, and to help fix the problem, we are going to need to find an alternate source of energy, and quick. Research into alternative fuels has yielded several possible options, including the use of corn in the production of ethanol, which has already had proven usage in places such as Venezuela. The most accelerated period of temperature change has occurred in the past twenty years, and it’s clearly evident that we need to address this problem while we still can.

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Feb 02 2009

How Much Green House?

Published by admin under Greenhouse Effect News

By: Ken Charnly

Lately, we have all been talking about the greenhouse effect. This effect relates to the expected warming of our planet resulting from changes to the composition of our atmosphere. There is mounting evidence that our own activities, most significantly the burning of fossil fuels, are a major contributor to this effect.

The predicted consequences are quite sever, including major changes in climate which will have impact on food production, and rising sea levels which will submerge coastal and other low lying communities. Lurking in the background hauntingly are the facts we have discovered about our near neighbor, the planet Venus. Because of its dense atmospheric gases, Venus has what has been described as having a runaway greenhouse effect, giving surface temperatures of about 8000F. Now I love the warm summer weather, but that is a little too hot for me.

The usual villains in the greenhouse scenario are gases such as carbon dioxide. Carbon dioxide, which, incidentally, we all exhale, has the unusual habit of absorbing infra-red radiation. Infra-red radiation for those of you less scientifically minded is actually heat radiating away from a warm object. During the day, sunlight warms the earth and during the night the Earth cools by radiating heat into space in the form of infra-red radiation. Carbon dioxide, and to a lesser extent other gases, absorb this radiation, limiting its exit out into space, and thus limiting the natural cooling effect.

Would it be safer if we had no greenhouse effect at all? Well, no, we do not want that either. There is another member of the heat absorbing clan. This is water vapor. There is a large amount of water vapor in the atmosphere at any time, which is why we have rain. The presence of water vapor as a heart absorbing gas keeps the Earth comfortably warm. Without this warmth, the planet would freeze, and life as we know it would not be possible. We therefore do need some greenhouse effect, just not too much. Mother Nature is again telling us what we should already know; in any situation, both of the extremes are harmful.

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Dec 26 2008

Principles of greenhouse effect

Published by admin under Greenhouse Effect Principles

By: Henry White

The emission of infrared radiation by the atmosphere results in the warming up of the surface of a planet. This process is called the greenhouse effect. In other words, certain gases in the atmosphere trap the solar energy so that the earth experiences a considerable rise in temperature. These gases include carbon dioxide, water vapor, methane, nitrous oxide etc. and they are known as green house gases. The absence of these gases will make the heat escape back into the space which will make life on earth impossible. Green houses make use of this mechanism.

Greenhouses are used to grow plants, especially in the winter. Most green houses resemble a small glass house. Here, it is the glass panel that plays the role of the greenhouse gases. The glass panels of a greenhouse allows the entrance of solar energy in the form of heat and light, but won’t let it escape. This raises the temperature inside the glass house and provides suitable atmosphere for the growth of the plants inside.

In the case of atmosphere, our earth receives energy from the sun. Once absorbed, this energy is sent back to the atmosphere. While doing so, a major portion of the energy gets absorbed by the greenhouse gases and warms up our planet. Green house effect, if enhanced considerably too can deny existence as it would heat up the earth than usual.

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Dec 26 2008

What is the Greenhouse Effect and the Importance of Methane to Climate Change

By Steve Evans

The greenhouse effect, also called the “greenhouse phenomenon” or “global warming”, has recently been receiving a great deal of scientific and popular attention. The term refers to a cause-and-effect relationship in which “heat blanketing” of the earth, due to trace gas increases in the atmosphere, is expected to result in global warming.

By global warming we mean an increase in the average temperature of the planet. Actually global warming is rather a confusing term because global warming does not mean that everywhere will be hotter all of the time, it just means that on average the globe will be warmer.

Now we just mentioned that “heat blanketing” is taking place, and that this is due to trace gases in our atmosphere. There are a number of so called ‘trace’ gases, which simply means gases that are present in the atmosphere at low levels, such that there is only a trace present (a small amount in proportion to the other gases). So it is these trace gases that are producing an effect which is like wrapping the world in a blanket. Just like any blanket, it has a net effect which holds the heat in.

These trace gases are increasing as the result of human activities. Scientists know this. It is easily measured historically by analyzing things like pack ice which was deposited in layers which layers can be readily dated and go back hundreds of thousands of years.

Carbon dioxide (chemically shown as CO2, which is simply a chemist’s shorthand way of telling us that it is a molecule made up from two Oxygen (O) molecules to each Carbon (C) molecule), is a trace gas.

The principal gases in approximate order of importance, are carbon dioxide, methane, the chlorofluorocarbons (considered collectively) and nitrous oxide.

Carbon dioxide is the trace gas scientists believe is contributing most to the “heat blanketing” and currently receives the most attention.

However, Carbon Dioxide is not the only trace gas which is implicated in climate change and methane is another which some have estimated to be over a third as much as that of carbon dioxide.

Gas from natural sources, cows and other ruminants, and natural sources where natural decomposition by fermentation produces methane, all contribute to the blanketing which is the cause of the greenhouse effect.

However, human activity is also responsible for a lot of methane gas production and Municipal Solid Waste Landfills have in turn been recognized to be a source of methane which is contributing to the atmospheric buildup.

However, the magnitude of the landfill methane contribution and the overall significance of landfill methane to the greenhouse effect have been uncertain, and the subject of some debate. But, as time goes on the evidence becomes stronger, and the fact of climate change is now accepted by the vast majority of scientists working in this field.

So, it appears that methane (using US waste generation data and remembering that the methane from United States landfills is a very large quantity) makes an important net contribution to the greenhouse phenomenon.

Landfill produces a lot of landfill gas which is largely methane. Measures to reduce landfill methane emissions are thought to be among the most economical steps which could be taken to address a component of this problem.

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Dec 26 2008

The Greenhouse Effect and Global Warming

Published by admin under Global Warming, Greenhouse Effect

By Raguraman Gurusamy

The gases that absorb radiation are called greenhouse gases. The greenhouse gases include the gases such as carbon dioxide, methane, nitrous oxide, ozone, or water vapor that contribute to the warming of the atmosphere of the Earth by reflecting radiation from the surface of the Earth. They keep the Earth warm. They naturally exist in the atmosphere, heating the atmosphere of the Earth by trapping energy that originally comes from the Sun. Due to this, the temperature of the Earth increases. This is known as the greenhouse effect. The greenhouse gases play the vital role in raising the temperature of the Earth. If the greenhouse gases are not there on the surface of the Earth, the Earth would be as cold as the surface of the Moon. The temperature would be around -18 degree Celsius. Actually, the characteristic surface temperature of the Earth is around 15 degree Celsius. It is now worried that the warming effects are being lamentably increased, inducing climate changes and melting of polar icecaps.

All the countries are keenly watching the warming effect. Almost all the countries are taking effort to measure the climatic changes taking places in the globe; however, the measurement is clearly showing that the global climate is keep on changing. In the past 100 years, the atmosphere of the Earth has warmed up by about half a degree Celsius. In addition, during this time human beings have also been released extra greenhouse gases. These gases have been produced as a result of burning the fossil fuels like coal, gas, and oil.

It is evident that the artificial emissions of greenhouse gases, by the activity of increased use of fossil fuels, are accountable for some of the warming of the global climate during the 20th century. The additional greenhouse gases present in the atmosphere absorb more energy and consequently increase the greenhouse effect. Due to this, the global temperature can raise further.

Besides by burning the fossil fuels, the greenhouse gases have also produced by the exhausts of motor vehicles. The destruction of rain forests is also responsible for the release of carbon dioxide, which in turn causes global warming. There are also many other natural ways by which the climate can be changed. The gases released from active volcanoes mix with the water vapor present in the air to create aerosols, and cool the atmosphere. The changes in the energy of the Sun and the flow of the ocean also affect the climate of the Earth. If the Earth keeps on to warm as predicted by the climate models, the temperature of the surface of the Earth may be three degree Celsius warmer than the current temperature by the year 2100. Due to this sudden change in the temperature, many ecosystems would get affected; which in turn affects many species of animals and plants.

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Dec 26 2008

Global Warming Caused By the Green-House Effect

Published by admin under Global Warming, Greenhouse Effect

By George Christodoulou

The green-house effect is the most important cause behind global warming. In fact global warming is known as the greenhouse effect. This phenomenon leads to an increase in the Earth temperature due to certain gases like CO2, nitrous oxide, and methane. These gases trap the energy from the sun and without them the heat would go back into space and Earth would be one massive iceberg. Since these gases warm the Earth, they are known as greenhouse gases.

In the last couple of decades, people have started using glass houses to grow plants in winter and these are called greenhouses. Typically, these houses will trap the heat from the sun. The glasses in the greenhouse let the light through and at the same time prevent the heat from escaping.

As a result, the greenhouse heats up to keep the plants alive in the winter. Similarly, the greenhouse gases in the Earths atmosphere work like the glass and prevent the heat from escaping. The sunlight enters piercing through the cloud of greenhouse gases and when it reaches the Earths surface, it is absorbed by land, water, and air.

After absorption the same energy is sent back into the atmosphere. Some of it remains trapped in the atmosphere due to the greenhouse gases and this energy makes the Earth warmer. Since there has been an increase in CO2 emissions in the last couple of decades, more and more heat is being absorbed in the atmosphere.

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Dec 25 2008

The Greenhouse Effect – What Is It?

By: Kenneth Scott

There has been much discussion, both among experts and lay people, about the greenhouse effect. The greenhouse effect is a term that refers to changes in the Earths atmospheric composition, which have been related to the warming of our planet. There is a growing amount of evidence that human activities, particularly those relating to the burning of fossil fuels like oil and coal, are major contributors to the greenhouse effect. The predicted consequences for the planet as a result of the greenhouse effect are extremely serious. They include major changes in the climate that will have an impact on food production and rising sea levels, which will put many coastal and other low-lying communities under water.

Additional information that we have learned about the planet Venus provide a frightening example of the greenhouse effect. Venus has a very dense atmosphere made up of gases. The planet has what has been described as a runaway greenhouse effect. It has surface temperature of about 800 degrees Fahrenheit.

Experts generally point to gases like carbon dioxide as the main contributors to the greenhouse effect. Carbon dioxide, which is a gas that is exhaled by everyone, can absorb infrared radiation. This type of radiation is heat that is radiating away from a warm object. During the day, the Earth is warmed by sunlight, and at night, the Earth cools off by radiating the heat back into space in the form of infrared radiation. Carbon dioxide, and other gases to some extent, absorb this radiation and limit its exit into space. Therefore, the natural cooling mechanism is thwarted.

While it may seem that eliminating the greenhouse effect would be the best strategy, this is not what we want to do. Water vapor represents another element in the heat-absorbing process. There is a great amount of water vapor in the atmosphere at all times. This is why we experience rain. We need the water vapor in the atmosphere to keep the Earth at its normal, comfortable temperature.

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Dec 25 2008

A Basic Introduction To Greehouse Vegetable Gardening

By: Katie Collins

For those of you looking to expand your gardening hobby, or those of you that wish to grow fruits, vegetables, or flowers in a climate that typically makes growing difficult, greenhouse gardening may be the hobby for you. Greenhouse vegetable gardening is becoming growing in popularity as greenhouses are now very economical, available in a wide variety of shapes and sizes, and can allow you to enjoy gardening in even the smallest of locations all year long.

What Is a Greenhouse?

A greenhouse is simply a structure with a glass, or perhaps a plastic roof, and also generally has glass or plastic walls as well. When located in a sunlit location the solar radiation heats the structure and the air warmed in this manner is retained in the building. The glass used works as a selective transmission medium for different spectral frequencies, which has the effect of trapping the energy within, which in effect heats both the plants and the ground inside. Greenhouses thus work by trapping electromagnetic radiation and preventing convection. These types of structures are often referred to as cold frames.

Common Greenhouse Uses for the Gardening Enthusiast

If you live in an area that supports summer gardening with fruits and vegetables, a greenhouse offers you a way to get a jumpstart on your spring growing. By starting your seeds or seedlings while it’s still cold outside you can later transplant these already growing plants when the weather permits. This therefore allows you to begin harvesting your produce or enjoying your flowers much earlier in the season than otherwise would be allowable.

Also, depending on how much sunlight you typically recieve in winter months you can continue to grow produce and flowers throughout the winter. This provides a year-round source of selected produce such as tomatoes. In addition, a full blooming flower garden is quite a beautiful treat and spirit lifter in the dead of winter.

Types of Hobby Greenhouses

Greenhouses come in a vast variety of shapes and sizes and are available in mental frames, wood frames and plastic frames. There are also a vast number of accessories and supplies that can be purchased along with the greenhouse. Basically your only limitations will be the amount of space that can be allocated for your greenhouse and how much you want to spend.

A good place for beginners to start is an attached greenhouse. This structure literally attaches to your home, garage or perhaps a shed via an outside wall. The advantages of this type of structure is the ability to get to the greenhouse anytime of day or night without having to go outside, as well as the ability to share some of the heat and electricity from your house or garage. The main problem with an attached greenhouse is often the ability to place it on a wall that gets the right amount of sunlight needed to grow your plants.

Whatever type you ultimately decide on, one thing is certain; when you begin to understand what greenhouse vegetable gardening (or flower gardening)can provide in terms of personal satisfaction, relaxation and emotional fulfillment, you will look forward to your special time each day that you spend in this little corner of your world and it will become a treasure that can last you a lifetime.

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Dec 24 2008

Thriving Plants Are The Best Greenhouse Effect

Published by admin under Greenhouse Gases

By: Mark Sheppler

What do greenhouses, glasshouses, and hothouses have in common? They all refer to a facility that controls the environment where specific crops are to be planted and harvested. In countries where harsh weather and climate conditions are manifest, greenhouses have revolutionized the green industry. By use of such a facility, one is able to control certain factors such as heat, temperature, and the like; creating or extending a growing season.

The Benefits of Greenhouses

A greenhouse traps heat and saves it for future use. Being able to grow one kind of plant, say out of season flowering shrubs, regardless of the external weather conditions is the main benefit of having a greenhouse. This in turn leads to the practical benefit of making certain crops, fruits, and flowers available all year round regardless of the season and weather.

A greenhouse gives you more control over the conditions that affect your plants’ growth. It gives you the ability to predict with a certain degree of accuracy how much crop you will harvest, unless of course something goes wrong in any of the various aspects and processes involved in its operations.

Because of these benefits, an enterprising individual can actually supply out of season flowers and crops and thus gain more profits because of it. The predictable plant production of greenhouse also gives a businessman a better handle on his business economics.

Construction of the Greenhouse

The materials commonly used for greenhouses include plastic and glass. These are specially modified materials that allow heat storage. Heat can then be allocated for future use so that the greenhouse can be maintained at a specific temperature all-year-round. Moreover, these structures have little or no openings because the warm air might escape and a drop in the temperature may lead to unfavorable results.

Greenhouse Limitations

Greenhouses need to comply with certain engineering specifications; this requires special design/build skills and specialized materials. Moreover, greenhouses need a lot of maintenance. Unlike normal gardening, greenhouse conditions must be strictly controlled and monitored. There are various systems for heating, cooling, circulation irrigation, and pest control. There may be specialized equipment for seeding, transplanting and potting. A greenhouses production numbers depend largely on how well the owner or the greenhouse operator has been able to maintain it at its optimal working condition.

Greenhouse for Hobbyists

Despite the costs and efforts needed to maintain a greenhouse, there are still a number of gardening aficionados who choose to maintain such facilities. While most people put up greenhouses for business purposes, there are hobbyists who maintain greenhouses for the pleasure of starting their own plants from seeds and cuttings, or to grow loved plants that would not survive the local climate outdoors. Greenhouses also make it possible for these gardening hobbyists to attend to their plants anytime they wish to do so.

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Dec 24 2008

The Perks of Global Warming

By: Nola L. Kelsey

Marya Mannes once wrote, “The earth we abuse and the living things we kill will, in the end, take their revenge; for in exploiting their presence we are diminishing our future.” Obviously Ms. Mannes preferred the status quo – health, sanity, logic, blah, blah, blah. Why? Green House Roulette is so much more intriguing.

In the country, weather affects everything. For five years western South Dakota has been gripped by drought. Water and hay are vanishing. Farms and ranches are blowing away. While the government bails out victims from hurricanes and says, ‘South Dawho?’ our cattle are pissing dust mites. Fortunately, things are looking up.

There is some good news. Those pesky glaciers are finally melting off! Last year an eight-nation report estimated an area of Arctic icepack the size of Texas and Kansas is gone. For those who are geographically impaired, that is an area bigger than a breadbox.

At first, news of devastating global climate change might seem a bit of a bummer. Then I read an LA Times article and had a change of heart. The article began with the usual gloom. Greenland’s ice cap is melting. Our coasts will flood from rising seawater. Inuit hunters are falling through thinning ice. Melting glaciers are changing ocean temperature and salinity contorting the jet stream, resulting in altered weather patterns worldwide. Multitudes of species are dying off . . . It was disheartening to read.

Then I got to the article’s final paragraph. Bam! My faith was restored. Here the Times pointed out the perks of global warming. Seriously, the article actually ended saying: “The report is not all gloomy. A warmer Arctic could increase the number of some species, such as Arctic char, a fish. It could extend the growing season for wheat in Canada and open up now-treacherous sea routes, such as the Northwest Passage and the Northern Sea Route, which parallels Russia, for shipping and resource exploration.”

Three cheers for the LA Times! It’s true! All is not gloomy. With that glorious bit of sunshine pumped straight up my ski bibs, I was able to see things in a whole new light. I started thinking of other advantages to global warming. Soon you will agree that people from all walks of life will benefit.

For starters, Inuit Hunters will benefit! Once Inuit have nothing left to hunt there will be no need for them to risk falling through thin ice. Plus, by needing food they will be ripe for a floating (pontoons, not ice) Arctic Super Wal-Mart. “Go get ‘em, Sam.”

Boat owners will benefit! Not only will there be smooth sailing through the formerly bothersome ice of the Northwest Passage, but each summer, cruise ships will be able to run tourists straight up Bourbon Street in New Orleans.

Scuba Divers will benefit! There will be no more burning coral cuts. In fact there will be no more coral. Once all the reefs are gone, divers can pack away first aid kits and dive straight in. A little silt never cut anyone.

Canadian Wheat Farmers will benefit! You see, there is a 10% decrease in yield of corn from Midwest crops for every degree of global warming. No worries though, now wheat can take the place of corn. Think about all those scrumptious Wheat Dogs at the ball game. How about popped wheat with butter at the movies or steaming wheat on the cob? All scream ‘yummy’ to me.

While it is a bit ironic that ethanol is made from the corn crops global warming devastates, I am sure some aspiring chemist will rise to the challenge of developing ‘Wheatanol.’ Imagine Canuck Wheat Farmers having more influence than the Saudi Royal Family.

Dune-Buggy enthusiasts will benefit! The Dakotas will soon reopen for your 4-wheelin’ pleasure. Join the Mount Rushmore Nose Climb on July 4th! It will be a bugger of a challenge!

Eco-Tourism Operators will benefit! Companies could offer new “Emaciation Tour Packages.” Tourists get closer photos of polar bears and whales when they are too lethargic from starvation to meander away. In addition, long treks to Inuit villages can be avoided once they are forced to beg on the streets of Nome (or cashiering at Wal-Mart).

Finally, the next generation of Bush family politicians will benefit! Once again they can avoid addressing campaign issues, this time by distracting dehydrated voters with witty campaign phrases like; “No Kyoto Pact-No Ice Pack,” or “Dead Seals Never Flip-Flop,” even promising “No Char Left Behind.” Not to mention offering new SPF 800 tax credits.

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