1) When we talk about the greenhouse effect, ... a) Heats up the earth surface b) ``Global warming`` c) We mean the planet is working like a greenhouse d) Don't allow the heat to escape 2) The sun's radiation enters the Earth's atmosphere and... a) Heats up the Earth's surface b) ``Global warming`` c) We mean the planet is working like a greenhouse d) Don't allow the heat to escape 3) Gases in the athmosphere, such as carbon dioxide and ozone... a) Heats up the Earth's surface b) ``Global warming`` c) We mean the planet is working like a greenhouse d) Don't allow the heat to escape 4) This causes what scientists call... a) Heats up the Earth's surface b) ``Global warming`` c) We mean the planet is working like a greenhouse d) Don't allow the heat to escape

Greenhouse effect

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