Not everyone uses electric cars. The air is polluted

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33. If I was a scientist, I would create vehicles that run on trash and waste

34. Chemical fertilizers would be a major cause of soil and water pollution if we stopped using them

35. if everyone used electric cars, the air wouldn't be pollute.

30. If the planet becomes hotter, many plants and animals will become extinct

31. If people cut trees, animals will lose natural habitats