1. It is absolutely essential to reverse the irrational misuse of nonrenewable resources . For example , fuel-efficient motor vehicles must be developed to reduce oil consumption and alternative energy sources must be found to replace coal .
2. While achieving success is easier said than done , persistence does in fact pay off . One of the most important traits of a successful person is self-confidence , another is desire , and still another is determination .
3. Recognizing a problem is the first step in finding a solution .
4. Many of the explanations offered thus far are at least to a certain extent valid , but none fully address the problem and the issue must be examined in a wider context .