We have been doing things since the 1980's. The government banned certain pesticides that leeched into the water system. They were put on the endangered species list. They are currently seeing a comeback in numbers and have been taken off the list. I'm fortunate enough to have grown up in a town where the eagles come in the winter for food. I went this Xmas to show my girlfriend and I counted five in a bunch of trees with two more flying overhead.