The ____ helps keep the Earth warm enough to support life. Gases like carbon dioxide are called ____ because they trap heat and warm the ____. CO2 is another name for ____. Most ____ burn fossil fuels like ____ or ____, which adds more CO2 into the atmosphere. The ____ can be hot some days and cold some days. The ____ is usually hot in Taiwan and cold in Wisconsin. ____ or ____ can cause unnatural droughts and storms. Part of the ____ causes warmer temperatures than are normal for a ____.

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