Across
- 2. Planting _____ trees helps a new forest grow.
- 7. Human actions use space that once provided _____ for living things.
- 8. When trees are cut down for wood, the forest _____ changes.
- 10. Garden plants give off _____ and keep the buildings below them cooler.
Down
- 1. When people cut down trees for wood, they change the _____.
- 3. Some people build _____ on flat rooftops.
- 4. Paved streets and buildings in cities absorb the sun's energy and make cities _____ than natural areas.
- 5. In cities, most of the _____ is covered with buildings and pavement.
- 6. People have ways to _____ wild plants and animals.
- 9. Plants and soil on rooftops capture _____ that would otherwise wash away.