Earth Day

2. Trash, such as paper, cans, and bottles, that is left lying in an open or public place.
6. The envelope of gases surrounding the earth or another planet.
8. A highly reactive gas composed of three oxygen atoms.
9. A community of living organisms (plants, animals and microbes) in a particular area.
12. Able to be upheld or defended.
13. Well-engineered and managed facilities for the disposal of solid waste.
14. (Of food or farming methods) produced or involving production without the use of chemical fertilizers, pesticides, or other artificial agents.
15. (Of a species, family, or other group of animals or plants) having no living members; no longer in existence.

1. The process of collecting and processing materials that would otherwise be thrown away as trash and turning them into new products.
3. The natural home or environment of an animal, plant, or other organism.
4. Protect (something, especially an environmentally or culturally important place or thing) from harm or destruction.
5. (Of a natural resource or source of energy) not depleted when used.
7. The surroundings or conditions in which a person, animal, or plant lives or operates.
10. The sun's rays as a source of energy from which power for domestic or industrial use may be generated.
11. To make foul or unclean, especially with harmful chemical or waste products; dirty.