Half of the solar energy enters the atmosphere and reaches the ground. It warms and the earth and is transformed into infrared radiation returned to space. But like a greenhouse, certain gases in the atmosphere prevent some of these rays again. Thus trapped, they help warm the atmosphere. Without this greenhouse effect the Earth’s temperature would be – 18 ° C and little water is in liquid form. This natural effect is beneficial and provides a mean temperature of 15 ° C.
Gases which are involve in Global Warming:-
The gases involved in the greenhouse effect are mainly water vapor, carbon dioxide, methane, nitrous oxide and ozone. Greenhouse gas emissions include industrial CFCs or HFCs, perfluorocarbons or PFCs and sulfur hexafluoride, or SF6, these gases are also responsible for the attack of the ozone layer.
These are the 6 gases covered by the Kyoto Protocol. Each gas has a power of global warming (or GWP) compared to carbon dioxide and a stay in the atmosphere.
Length of stay and power global warming greenhouse gas emissions:-
The main greenhouse gases are naturally occurring and scarce. But because of human activity, the atmospheric concentration of some of them increased significantly, mainly ozone (O3), carbon dioxide (CO2) and methane (CH4). Since 1750, the rate of CO 2 in the atmosphere has increased by 30%, that of CH4 to 145%. But the combined effects of all greenhouse gas emissions equivalent to an increase of 50% CO 2 from the same period.
Today and after many hesitations, there is consensus on the impact of human activity on climate change. The Intergovernmental Panel on Climate Change (IPCC) issued a new report in 2001 which estimated that “evidence more recent and conclusive can be said that most of the warming observed over the last fifty years is due to human activities “.
December 2nd, 2009 at 10:06 am
I think this info should be shared around the nation to evoke the matter of greenhouse effects within the people.