Status of animals 50 years ago

There are more animals in this planet 50 years ago. There are different species of animals living peacefully with ample amount of food and water which have gone extinct due to humans' negligence. They also have a better chance of survival because of what the environment offered them. Unlike now, forests no longer have enough trees to shelter these animals. Pollution is rampant which kills dozens and dozens of animals. Furthermore, animals are living at peace before.