Greenhouse gases - Carbon dioxide is one of the ________________________ that leads to global warming., Fossil fuels - ___________________, like coal and oil, must be reduced if we want to save our, Endangered species - If we don't care about animals, many of them will become _____________________., Waste - We should try to recycle our _________________ and try not to use too much packaging, Air pollution - The population in big cities suffer from _____________________, caused by factories., Solar panels - More and more people are putting ___________________ on their roofs., Sustainable energy - ______________________comes from renewable sources, so it respects natural resources, Bin - Put the old newspapers in the recycling __________., Floods - Earthquakes and ____________are natural disasters, Global warming - Smog was cited as a major factor that contributes to _____________.,

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