Across
- 2. who helps animals
- 6. who created the garbage can
- 7. who created the water filter
- 8. who created natural gas
- 10. who created the hydraulic energy
Down
- 1. who helps the environment
- 3. who created the electric cars
- 4. who was thw most important in the wold
- 5. who created the energy
- 9. Clapham who investigates ecosystems