1) According to the speaker, greenhouse gases are produced by ____________ a) heat from the sun b) the actions of people c) the sun's rays, and also the actions of people d) the video doesn't say 2) Which of these things is a greenhouse gase? a) hydrogen b) carbon dioxide c) oxygen d) the video doesn't say 3) Which of these ways to generate power provides a clean source of energy? a) gas b) oil c) wind power d) they are all clean sources of energy 4) Which of these things can help reduce levels of carbon dioxide? a) driving to work b) heating with coal instead of gas c) using public transportation d) leaving your TV on standby, rather then switching it off. 5) Which of these predictions about climate change does the video make? a) If the planet gets warmer, then polar bears will become extinct. b) If the planet gets warmer, then we can expect more floods. c) If the planet gets warmer, then fuel will become less expensive. d) If the planet gets warmer, then sea levels will rise. 6) Which of these things isn't mentioned in the video? a) wave energy b) car pooling c) coral reefs d) heat waves

Climate change

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