Name _______________

Once upon a time, the Earth's climate changed naturally. Over the years, human activity has contributed to the changes in the Earth's climate through population growth, deforestation, the burning of fossil fuels, and daily human activity. Exactly what are these gases doing to the Earth? Is this a serious problem? You be the judge

	How is the earth's atmosphere like a greenhouse?
	What is the greenhouse effect? And how does it contribute to global warming?
	Give two examples of greenhouse gases.
	When do humans send greenhouse gases into the air?
	How many tons of greenhouse gases does each person emit in the United States each year?

• The U.S. Environmental Protection Agency Kids Site http://www.epa.gov/globalwarming/kids/greenhouse.html
• Cool Climate Kids Club: Frequently Asked Questions http://www.coolclimate.org/faq.htm
• Introduction to Climate Change http://www.climateark.org/vital/intro.htm
• Solcomhouse: The Power for the People http://www.solcomhouse.com/globalwarming.htm
• The U.S. Environmental Protection Agency http://www.epa.gov/globalwarming/
• Individual Emissions http://www.epa.gov/globalwarming/emissions/individual/index.html

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