1. We shouldn't _______ bottles. It's better to ______ them. 2. You can _____ energy by using public transport. 3. Nuclear power stations don't _____ the air, but they create dangerous waste. 4. Waste plastic ______ marine animals. 5. When you _______ plastic, dangerous gases go into the atmosphere. 6. If you ______ plastic, it will stay in the ground for 1,000 years. 7. You ______ energy when you leave the window open in winter.