Across
- 4. A mixture of gases that surrounds our planet; can be polluted from exhaust from vehicles or factories.
- 5. A process that allows the organic material in solid waste to be decomposed and reintroduced into the soil, often as fertilizer.
- 7. A group of similar organisms that can mate with each other and produce fertile offspring.
- 8. The disappearance of all members of a species from Earth
- 9. Waste materials from industry that are poisonous to humans or other living things
- 10. An area that provides an organism with its basic needs for survival.
Down
- 1. The total surroundings (living and nonliving) of an organism or a group of organisms.
- 2. Cutting down of forests leading to increased erosion and slower soil regeneration.
- 3. The process of making new products from materials that were used in another product.
- 6. The excessive use of material things, including food and natural resources