1) is when something is added to the environment that is harmful or poisonous a) chemicals b) pollution 2) happens when harmful things like trash and chemicals get into the water. a) water pollution b) air pollution 3) happens when bad gases go into the air. Factories and cars are making the air dirty a) noise pollution b) air pollution 4) happens when harmful chemicals, trash, or waste get into the ground. This makes the soil dirty and unhealthy for plants and animals. a) soil pollution b) climate change 5) happens when there are too many loud sounds, like cars, airplanes, or machines. It can hurt our ears and make animals scared. a) water pollution b) noise pollution 6) When there’s too much pollution, the Earth gets hotter. a) chemicals b) climate change 7) is a big building where people and machines work together to make things. a) factory b) pollution 8) are special substances that can change things or make new things. a) factories b) chemicals

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