In the past,our city was very clean ,there were fresh air,so many trees around us,the river was clean,but now,with the popullation grow,the environment goes bad.the industry factory and cars couse air pollution, the sky is grey ,it lost its colorful.A lot of animal have dead since the environment gose bad.we should protect our environment now!
How to protect the environment,we should plastic bags ,plant many trees and so on.
The environment is very important for our lives .we should protect our world !
