Global Warming (answer attached)

Global Warming

Global warming is one of the toughest environmental challenges today, and it threatens the health of people, wildlife, and economics around the world.  According to the United States Environmental Protection Agency, the problem is mainly carbon dioxide and other fossil fuels.  These fuels, like water vapor, methane, nitrous oxide, and ozone, are then collected like a blanket in the atmosphere.  Energy from the sun is supposed to drive earth's weather and climate and heat the earth's surface, and in turn the earth radiates energy back into space.  When the atmospheric greenhouse gases trap some of the outgoing energy, the heat is retained somewhat..........