What is Global Warming?

    http://www.nmsea.org/Curriculum/Primer/Global_Warming/fossil_fuels_and_global_warming.htm

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As you can see, the annual average and the five year average has greatly increased in global temperatures.

   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. The most significant greenhouse gas is water vapor, but it is not cause directly by humans. However, even the slightest increase in carbon dioxide can cause a significant amount in temperature increase. Why is that we ask? Well because neither oxygen or nitrogen are greenhouse gases. Both water and CO₂, for example, have these "internal vibrational modes", and these vibrational modes can absorb and reradiate infrared radiation, which causes the greenhouse effect.  Second, CO_{2 remains in the atmosphere for a very long time.(Hundreds of years.)}