One question comes up which is very difficult to answer. The problem can be illustrated by a simple example. Imagine that you own a forest. The forest is a part of your environment. You need firewood to cook, you need to build a house to live in and you want to sell some trees to make money that you can use to buy some cattle.
Many people say that the solution is to cut down only a few trees.
You use some for firewood and some for building-material, but you have to wait to buy the cattle. Then, the forest will re-grow and you can cut down more trees in the future. If, on the other hand, you choose to cut down all your trees the first time, you could have bought your cattle as well. But you would not have any trees to cut down in the future, and neither would your children.