When writing a problem solution essay you can use the following types of structure:

1. Introduction- introduce topic and give your clear answer to the task question
2. Problems – give examples and supporting details
3. Solutions – give examples and supporting details
4. Conclusion – restate your answer to the question

or

1. Introduction –  introduce topic and give your clear answer to the task question
2. Main problem #1  & possible solutions  – give examples
3. Main problem #2  & possible solutions – give examples
4. Conclusion – restate your answer to the question

Download the tasks

Task 1: Envrionmental problems and solutions

Task 2: Problem Solution Independent Exercise