Global warming is the increase of earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from earth.
Green house effect - definition
The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere.
Causes of green house effect and global warming - definition
The greenhouse gases that occur naturally in the atmosphere are water vapor, carbon dioxide, nitrous oxide, methane and ozone. A few human activities lead to an increase in the levels of these naturally occurring gases. The main reasons for the emission of Greenhouse gases and global warming causes and effects thereby, are burning of fossil fuel like coal in the industries fro producing electricity. Burning fossil fuel leads to high emissions of carbon dioxide gas. Another green house gas, methane, which is more powerful than CO2 at trapping the heat in the atmosphere, gets released from resources such as rice paddies, bacteria in bogs and fossil fuel manufacture. Nitrous oxide, also a green house gas is produced during nylon and nitric acid production, cars with catalytic converters, the use of fertilizers and the burning of organic matter. A greater emission of nitrous oxides in the recent decades is leading global warming.