Across
- 2. produced or involving production without the use of chemical fertilizers, pesticides, or other artificial agents.
- 4. the natural world, as a whole or in a particular geographical area, especially as affected by human activity.
- 7. not harmful to the environment.
- 9. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.
- 10. all the plants of a particular place or from a particular time in history.
- 11. all the animals that live wild in a particular area.
- 12. become or make greater in size, amount, intensity, or degree.
- 13. undergo natural development by increasing in size and changing physically.
- 14. material such as coal, gas, or oil that is burned to produce heat or power.
Down
- 1. make or manufacture from components or raw materials.
- 3. the long-term warming of the planet's overall temperature.
- 5. gas a gas that contributes to the greenhouse effect by absorbing infrared radiation,
- 6. make or become smaller or fewer in size, amount, intensity, or degree.
- 8. o finish, use, or sell all of something, so that there is none left.
- 11. the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
