13. Governments worldwide are trying to reduce their _______, which are gases like carbon dioxide and methane that trap heat in the atmosphere.

14. The process of treating used materials like paper, glass, and plastic so they can be used again is called _______.

3. _______ is the cutting down of trees in a large area, leading to habitat loss and soil erosion.

7. Solar, wind, and hydro power are all examples of _______ energy sources.

11. Exhaust fumes from cars and factory smoke are major contributors to _______, especially in big cities.

12. The destruction of habitats is leading to _______, as many species of animals and plants are disappearing forever.

5. To reduce waste, we should use _______ bags instead of single-use plastic ones.

10. _______ farming often relies heavily on chemical fertilizers, which can damage the soil over time.

1. The burning of _______, such as coal and oil, releases large amounts of carbon dioxide into the atmosphere.

8. The contamination of rivers and lakes by chemicals from factories is a serious form of _______.

15. Extremely dry and hot weather can increase the risk of a _______, a large, destructive fire that spreads quickly through natural areas.

9. Many plastic bags and bottles end up in the ocean, contributing to _______.