Earth Month

3. Tall woody plants with a single main stem or trunk and many branches
6. To make something smaller or use less of it
7. To convert waste into reusable material
8. A living thing that grows in soil and has a stem, leaves, and roots
9. The long-term warming of the planet's overall temperature
11. The physical world and everything in it; not made by the people
15. A biological community of interacting organisms and their physical environment

1. Waster material that is discarded improperly
2. A synthetic material; one of the main pollution for marine life and ecosystems
4. The introduction of harmful materials into the environment
5. Natural or artificial substance that improves plant growth and productiveness
10. To use something again, especially for a different purpose
12. Waste material that is no longer needed or wanted
13. The planet on which we live
14. A huge body of saltwater that covers about 71 percent of Earth's surface