What is Global Warming?

It is the average rise in temperature of the oceans, surface and the atmosphere of the Earth. Past three decades, the mean surface temperature of the Earth was increased about 0.8°C (1.4° F). Scientists estimated that 90% of the effect is due to green house gases produced as a result of burning fossil fuels and deforestation.

The climate changes usually vary from place to place around the globe. The Modern Theories predict that the global temperature increase in the past 130 years is abnormal.

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