Across
- 2. A specific group of farm animals that releases a greenhouse gas.
- 4. reefs __________ build their skeletons from calcium carbonate.
- 6. The practice of taking care of the world so that it can continue to be beautiful and healthy.
- 7. __________ is a good way to use food scraps to make fertilizer.
- 9. gases act the same way as glass walls trapped in heat.
Down
- 1. By cutting down lots trees you can cause _____________
- 2. ___ is released into the atmosphere in natural ways like when animals exhale.
- 3. change Long term changes to temperature and earth.
- 5. Paper,plastic,metal,and other materials to conserve natural resources and reduce waste.
- 8. fuels coal, oil, and gas, are examples of ___