【正确答案】One possible version
Where are a lot of tourists every day. Several years ago, some of them pay no attention to the environment protection. They not only threw wastepaper, plastic hags and tins here and there but killed animals, caught birds, destroyed trees and flowers. Sometimes, they even made a fire to cook in the forest, which was dangerous. However, changes have taken place now. When visitors leave, they usually take away rubbish with them. They no longer hunt animals and plants are protected. All the tourists carry their lunch in order not to start forest fire. We must sing high praise for this good behavior.