GREEN HOUSE EFFECT

Warming of Earth's surface and lover atmosphere that tends to intencify with an increase in atmospheric carbon dioxide and certain other gases. Visible light from the sun,heat the Earth's surface. Part of energy is reradiated in the form of long -wave Infrared Rdiations, much of hich is aborded by molecules of crbon dioxide and water vapour in the atmosphere and reradiated back towards the surface as more heat.
This process is analogous to the glass panes of green house that transmit sun light but hold heat. the trapping of nfrared radiations causes the Earth's surface and love atmosphere to warm more than they otherwase would,making the surface haitable. the increase in atmospheric carbon dioxide caused by widespread combustion of fossil fuels may intencify the greenhouse effect and cause long-term climtic change.
An increase in atmospheic concentractions of other trace gases such as chloroflurocarbon, nitrous oxide and methane may also aggravate green house condetions. It is estimatd that since the begening of ndustrial revolution the amount of atmospheric carbon dioxide has incresed 30%, while the amount of methane has doubled. Today the U.S. is responsible for about one fifty of all human produced greenhouse gas emmission.