Across
- 3. fog that has mixed with smoke and chemical fumes
- 6. process of gathering food scraps and organic waste into a bin and letting it decompose and then adding it to soil to help plants grow
- 7. type of energy that cannot be used up, such as wind, water, or solar power recycling process in which used materials are turned into new products
- 8. substances that contaminate the environment and can harm people
- 11. goods that have a less harmful impact on the environment than traditional products
Down
- 1. natural forms of energy, such as oil, natural gas, and gas, that were formed a very long time ago, when dinosaurs lived on Earth
- 2. actions that maintain the natural resources in the environment
- 4. able to break down without causing harm when thrown out
- 5. gas made up of oxygen that naturally exists high above Earth’s atmosphere
- 9. number that communicates to the public the level of pollutants in the air brownfieldsite land, such as an old factory or gas station, that contains hazardous waste
- 10. rain any form of precipitation that includes particles containing acid