Environment

3. The act or process of destroying
5. Vapor, gas, or smoke, especially if irritating, harmful, or strong
7. A sudden violent change in the earth's surface; a cataclysm
8. An element, a gas without taste, colour or smell, forming part of the air
13. The process of changing a rural area into an urban one
14. The number and variety of species found within a specified geographic region
16. A means of destroying waste products, as by grinding into particles

1. A substance, usually a liquid, capable of dissolving another substance
2. The act of insulating or the state of being insulated
4. The region of the atmosphere above the troposphere and below the mesosphere
6. Of or relating to the internal heat of the earth
9. An ecological community together with its environment, functioning as a unit
10. The emission or transfer of radiant energy as particles, electromagnetic waves, sound,
11. Capable of being decomposed by biological agents, especially bacteria
12. The act or an instance of emitting
15. The cyclic rise and fall of sea level caused by the gravitational pull of the sun and moon