Our future on Earth looks very bad. We are throwing rubbish on our land. We can't breathe the air. The sea is dirty, too. I visit some relatives recently in a small village. They grow their own food. They're not rich, but they are happy and healthy. We should close some factories, because they are producing useless products. That would reduce (减少) rubbish and air pollution. We should recycle more. and improve (提高) public transport. Overpopulation (人口过多) is a big problem in big cities. We should give up useless factories and get back to a simple way of life.
