Across
- 3. caused by things like car exhausts, factory fumes
- 4. not to waste energy, to use energy efficiently
- 6. It causes an increase in the temperature of the earth's surface, melting of glaciers and climate changes.
Down
- 1. a plant that is very important for our world that cleans the air
- 2. third largest planet flattened from the poles and bulging from the equator
- 5. Reuse of things such as plastic, glass, paper by processing