In my opinion, humans are both the solution and the problem for the environment. Take the High Line as an example. Before, “In the decades of disuse, many people were calling the High Line an ugly eyesore”. Humans make this problem. However, we solve this problem. They change the high line to park which for people to take a rest. Today, the High line is a good place to take a rest for New York citizens. I think for the environment, humans are the problem maker. But nowadays humans find out this problem and try to fix it. I think the climate will change self-regulate if the human stop damages the environment. But it will take a long time due to this problem by themselves.