Crosswords Puzzle

Horizontal Words

1. These help to keep the earth warm (15)
3. This is any long-term significant change in average weather patterns. (13)
5. These are natural fuels formed from the remains of plants and animals, e.g. coal (11)
7. The total amount of greenhouse gases produced directly and indirectly by humans (15)

Vertical Words

2. Protects the earth by absorbing the harmful ultraviolet radiation of the sun (10)
4. Raises sea levels and causes damaging climate change (13)
6. Any harmful addition to the environment (9)