1. The problem we can see is only the __________; there are many hidden causes behind it., top of the mountain, tip of the iceberg, end of the road, 2. Coal, oil, and gas are examples of __________ that cause pollution., fossil fuels, green products, natural foods, 3. The __________ happens when gases in the atmosphere trap heat from the sun., weather system, climate cycle, greenhouse effect, 4. Carbon dioxide and methane are important __________ that contribute to global warming., greenhouse gases, weather conditions, natural resources, 5. Solar and wind power are types of __________ energy., limited, renewable, dangerous, 6. One person’s efforts to protect the environment can feel like __________ without bigger changes., a piece of land, a wave of change, a drop in the ocean, 7. Scientists have noticed more extreme __________, such as unusual storms and temperatures., weather anomalies, weather results, weather mistakes, 8. Many experts are worried that natural resources are __________ because people use them too quickly., growing up, running out, breaking down, 9. Climate change is causing __________, which threaten cities near the coast., stronger oceans, rising sea levels, higher mountains, 10. Cities are developing __________ plans to reduce the effects of extreme heat., heat management, heat creation, heat increase, 11. __________ can put pressure on housing, food supplies, and the environment., Overcommunication, Overpopulation, Overeducation, 12. Cutting down too many trees leads to __________., recycling, deforestation, pollution control, 13. A long period of extremely hot weather is called a __________., cold wave, rain season, heat wave, 14. Throwing away edible food creates unnecessary __________., food growth, food waste, food energy, 15. Cars and factories can cause __________ in large cities., clean air, fresh water, smog and air pollution, 16. The __________ protects the Earth from harmful radiation from the sun., carbon layer, ozone layer, climate zone, 17. A long period without enough rain is called a __________., drought, hurricane, flood, 18. Countries are trying to reduce their __________ to slow climate change., carbon supplies, carbon materials, carbon emissions, 19. Many animals are in danger of __________ because of habitat loss., moving faster, dying out, growing bigger

Environmental Issues (B2)

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