Everybody knows that there are a lot of ecological problems nowadays., Water and air pollution, noise from cars and buses, destruction of wildlife and nuclear waste endanger people's life., in the places where people drink dirty water, eat bad food and breath polluted air they suffer from serious diseases., Plants and animals need a healthy space to live and grow too., This problem becomes more and more urgent with every passing day., But nowadays people are beginning to understand how fragile our planet is., For example, they use good filters at factories and power stations, plant trees and recycle waste., If people want to survive, they must solve environmental problems very quickly., Earth is our home that must be kept ecologically clean.,

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