随着中国经济的发展及加入世贸组织,轿车将越来越多地进入普通家庭。一方面，刺激了经济的发展，方便了人们的生活；另一方面， 造成了严重的环境污染。请就此问题写一篇文章，词数120左右。　

My name is Rachael. When I grow up, I want to be a biology teacher because then I could teach children about the environment. I think that the world is a wonderful place, but I worry about it. People don't care about nature. They only care about making lots of money. They should remember that if we destroy all the trees, then we will not survive. I get sad, too, when people kill each other. Grown ups play silly games sometimes. It's no fun.