Global Warming

Global warming is the increase in average global temperatures over time attributed to a combination of natural and human factors. It has become a grave threat to the ecological balance of the earth. One of the leading causes of global warming under investigation is the green house effect of gases. What is green house effect? If you construct a green house you will find that its glass allows short-wave radiation to enter but prohibits outgoing long- wave radiation from exiting, thus warming the air in the house. Something similar happens in the atmosphere. If it was not for the natural green house effect, almost all radiation would be returned to space and the average surface temperature would be around 0’C. Atmospheric gases that cause this effect include carbon dioxide and methane. Rise in the amount of these gases in the atmosphere results in a corresponding increase in global temperatures.