1) The average surface temperature on Earth is ___ now than it was 100 years ago. a) lower b) higher c) the same 2) Greenhouse gases appear when we ... a) use renewable energy. b) cut down rainforests. c) burn fossil fuels. 3) Rainforests are important ... a) because they add CO2 to the atmosphere. b) because they add oxygen to the atmosphere. c) because people use them as fuel. 4) Scientists say that some ... could die out because of climate change. a) plant and animal species b) cities c) rainforests 5) Polar ... are melting. a) bears b) ice caps c) icebergs 6) ... may run out by the year 3000. a) Renewable energy b) Nuclear energy c) Coal and gas

Solutions Pre 4E Global warming CCQ

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