Department of Environmental Sciences, South Africa., South Africa
Global Warming -2020 : Global warming: The causes and impacts.
Author(s): Charmaine Moyo
Global warming occurs when incoming ultra violet solar radiation from the sun strikes the earth and is absorbed by the atmosphere, earth’s surface and water bodies. Much of it is then reflected back into the atmosphere as infrared radiation, keeping the earth habitable. For earth’s temperatures to remain stable these two should be in equilibrium. However, they are not, due to the emission of green-house gases by anthropogenic activities, that result in the green-house effect (because a similar process occurs in a green-house, high energy UV radiation penetrates the glass walls of a green-house, but weaker IR cannot pass through the glass, the trapped IR keeps the greenhouse warm even in the coldest winter weather). This has resulted in the increase in the average temperatures of the earth’s surface and oceans. Long term heating of the earths’ climate system has.. Read More»