Factory emissions are a cause of __, global warming., __ is a huge threat to many animals., Climate change, Carbon dioxide is one of the best-known __, greenhouse gases., ___ such as coal and oil produce carbon dioxide., Fossil fuels, This space rocket __ a lot of fuel., consumes, You can __ by flying less., reduce the carbon footprint, We need to __ in our rivers., tackle pollution, We can reduce pollution by using more types of __, alternative energy., We must use more __, like wind and solar., green energy sources.

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