HFC, for example, an industrial gas, has 11, 000 times the greenhouse effect of CO2.
First, "greenhouse gases" refers to several gases recognized by scientists as enhancing the greenhouse effect.
Greenhouse effect: heating of the earth's atmosphere due to an increase in gases like carbon dioxide.
We also know that since the industrial revolution began, mankind's actions have contributed significantly to that greenhouse effect.
That is because the CO2 greenhouse effect is weak and marginal compared to natural causes of global temperature changes.
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The harmful pollutants released into the air by coal-fired electricity generation, such as sulphur, also dampen the greenhouse effect.
As early as 1989, for instance, in an article entitled "Space-based Solar Shield to Offset Greenhouse Effect, " James T.
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This is the radiation the planet sheds as it cools, and it is the radiation captured by the greenhouse effect.
If it has an atmosphere like Earth's, with a corresponding greenhouse effect, its average surface temperature would be a balmy 22C.
CO2 is one of the substances responsible for greenhouse effect and as such, efforts are being made to reduce the emissions of CO2 worldwide.
The gas would soon find its way into the atmosphere, where it would add to the greenhouse effect and cause the temperature to rise.
Moons that orbit their planet too closely will experience strong tidal heating and a runaway greenhouse effect that would boil away any surface water.
Due to the important role of humidity, tropical glaciers are likely to be the climatic indicators the most sensitive to climatic changes like the greenhouse effect.
Nonetheless, the idea that carbon dioxide spewed by the world's industries is causing more heat to be trapped in the atmosphere (the "greenhouse effect") has found wide acceptance.
"It is time to stop waffling so much and say that the evidence is pretty strong that the greenhouse effect is here, " he told reporters after that appearance.
The star actor was NASA Godard Institute for Space Studies director James Hansen who claimed with 99 percent certainty that temperatures were rising due to a human-influenced "greenhouse effect".
Dr Harries's conclusion is that the greenhouse effect has changed over the past few years in exactly the way that those who believe in global warming would have predicted.
The Shard has 11, 000 glass panels, with each side equalling a total area of 56, 000 sq m (603, 000 sq ft), meaning there was a genuine concern over a possible greenhouse effect.
In this audio section, BBC World Service environment specialist Richard Black explains the so-called greenhouse effect, global warming, the implications for the human race and the significance of the Kyoto summit.
Both are far better at trapping heat than carbon dioxide, meaning that cows, chickens and their ilk have a larger greenhouse effect than all the cars, trucks and planes in the world.
But the strength of the greenhouse effect depends on the chemical composition of the atmosphere, because the phenomenon is due to the absorption of infra-red radiation by various gases in the air.
The WMO data, meanwhile, confirms that atmospheric concentrations of the three gases principally responsible for the man-made component of the greenhouse effect - carbon dioxide, methane, and nitrous oxide - all rose during 2009.
Most of it is, of course, radiated back into space. (It is the partial blocking of this radiation by gases such as carbon dioxide that causes the much-talked-of greenhouse effect.) Some of it, however, goes in the opposite direction, into the ground.
But that weather, all weather, is different because the greenhouse gas effect has changed the weather system even if the different daily weather is not a JND.
These reflect sunlight away from Earth and thus oppose the effect of greenhouse gases.
That has led the Manomet Center for Conservation Sciences to say that the net effect on greenhouse gas emissions is higher.
The warming effect caused by greenhouse gases rose 29% since 1990 and 1.4% over the last 12 months ending Dec. 31, 2010.
Add the fact that it has little or no effect on reducing greenhouse gases, and the case for something better becomes appealing.
For we do know very well what is the direct effect of a doubling of greenhouse gases.
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Since both of these chemicals are more potent greenhouse gases than carbon dioxide, this effect, too, should help combat global warming.
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