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Global warming is the result of increase in the earth's average surface temperature.
Today, the amount of carbon dioxide is higher than at any time in the last 650,000 years.
The green house effect is the trapping of the sun's warmth in a planet's lower atmosphere due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
Global sea level rose about 17 cm in the last century. The rate in the last decade is nearly double that of the last century.
The oceans have absorbed much of this increased heatwith the top 700 meters of ocean showing warming of 0.302 degrees Fahrenheit since 1969.
The number of record high temperature events in the US has been increasing while the number of record low temperature events has been decreasing, since 1950.
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