Today, we get a lot of energy from fossil fuels: coal, oil, and (17) (NATURE)
__________ gas. But when we burn fossil fuels, they cause air (18) (POLLUTE)__________, and they are (19) (NEW)
__________. This means they will not last forever. In the long term, we will have to find alternative sources of energy. (20) (SUN)
__________ energy uses panels to catch sunlight and convert it into electricity. However, it doesnt work at night and needs a lot of space. Wind power is another type of (21) (RENEW)
__________ energy source. Its cheap and produces clean energy, but wind turbines can be (22) (NOISE)
__________ and some people think they look ugly.
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