Climate Change

1. The maintenance of environmental conditions to ensure that resources are not depleted
5. The degree to which something is bad or serious
7. The process of reducing or preventing something harmful
9. The state of being scarce or in short supply
12. A gas that contributes to the greenhouse effect
13. The introduction of something harmful into the environment
15. A living thing, such as a plant or animal
17. The process of planting trees to replace those that have been cut down
19. The variety of different living things in an area
20. The physical structures and facilities needed for a society to function

2. The gradual increase of acid levels in oceans and other bodies of water
3. The killing or destruction of living things and their habitats
4. An area where an organism lives and obtains what it needs to survive
6. A natural feature of the earth's surface made of ice and snow
8. A natural event with rotating winds that can cause damage
10. The degree to which something is bad or serious
11. A natural disaster with strong winds and heavy rain
14. The remains of ancient plants and animals that have been preserved in the earth's crust
16. The release of pollutants into the air
18. An area where living things interact with each other and their surroundings