2. Study the Active Vocabulary. Insert the missing words. 1. We are ______ for the ecology of our planet. 2. If forests are destroyed too quickly, their ability to ______ decreases. 3. ______ is a chemical process in green plants in which carbonic gas turns into ______. 4. Great areas of forests are ______ because of human activity. 5. National parks are places where the beauty of nature is ______. 6. Men cut forests because they needed ______ and place for agriculture. 7. In the ______ areas where there is no forest, the process of ______ of the soil can begin easily. 8. Some ancient ______ disappeared because they knew nothing about ecology.

Let's fill in the missing words in the sentences: 1. We are **responsible** for the ecology of our planet. 2. If forests are destroyed too quickly, their ability to **regenerate** decreases. 3. **Photosynthesis** is a chemical process in green plants in which carbonic gas turns into **oxygen and glucose**. 4. Great areas of forests are **lost/destroyed** because of human activity. 5. National parks are places where the beauty of nature is **preserved**. 6. Men cut forests because they needed **timber** and place for agriculture. 7. In the **deforested** areas where there is no forest, the process of **erosion** of the soil can begin easily. 8. Some ancient **civilizations** disappeared because they knew nothing about ecology.