Unit22《Environmental Protection》(Lesson 1)ppt-北师大版高二下-302edu教育资源网

Unit22《Environmental Protection》(Lesson 1)ppt-北师大版高二下

The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earth’s average temperature would be about 60ºF colder. Because of how they warm our world, these gases are referred to as greenhouse gases.

The Greenhouse Effect

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