Across
- 6. The gradual increase in the Earth's temperature.
- 9. Protecting and saving natural areas for wildlife.
- 11. Catching too many fish, damaging the marine ecosystem.
- 12. Rain that contains harmful chemicals from factory pollution.
- 13. The washing or blowing away of the top layer of earth.
- 14. Recycling organic waste, like food scraps, into fertilizer.
Down
- 1. Energy from natural sources that never run out, like sun or wind.
- 2. The dumping of harmful substances or plastic into the sea.
- 3. Able to decay naturally and harmlessly.
- 4. The cutting down and clearing of forests.
- 5. A gas that traps heat in the atmosphere, like carbon dioxide.
- 7. Energy sources that will eventually run out, like coal.
- 8. Sources of energy like coal, oil, and gas.
- 9. The destruction of natural homes for plants and animals.
- 10. The total amount of greenhouse gases produced by human actions.