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2. An alternative to driving, often involving bicycles or walking
5. Energy harnessed from the sun
7. Farming A method of farming without the use of synthetic chemicals
8. The process of converting waste materials into new materials and objects
10. An environmentally-friendly mode of transportation, often using electric power (two words no space)
12. Certification for goods produced without exploiting workers (two words no space)
15. A device used to capture rainwater for later use (two words no space)

1. The practice of growing crops without soil, often using water and nutrients
3. The amount of carbon dioxide and other carbon compounds emitted due to the consumption of fossil (two words no space)fuels
4. The process of converting waste materials into reusable materials
6. The largest marine ecosystem on Earth, often harmed by plastic pollution
9. A reusable bag that can be carried while shopping
11. A material that breaks down and returns to the natural environment
13. The three "R's" of sustainability: Reduce, _____, Recycle
14. A major source of renewable energy, often seen in fields with turbines (two words no space)