Across
- 3. an example for renewable energy sources
- 4. it is a greenhouse gas
- 6. synonym for household rubbish
- 7. sth. that you can use more than once
Down
- 1. a cause of global warming
- 2. another word for to burn sth.
- 5. represent 80% of the world's energy consumption
- 7. they are rising because of global warming
- 8. they are melting