Across
- 2. The average weather conditions over a 30 year period
- 3. Humans breathe in this gas
- 5. The most abundant atmospheric gas
- 8. The movement of carbon, in its many forms, between the atmosphere, oceans, biosphere and geosphere.
- 9. Plants do this to create food
- 11. This types of renewable energy source comes from the Earth's core
- 12. These are burned to create energy, they are non-renewable
Down
- 1. This type of carbon cycle operates on a timescale of thousands of years
- 4. These gases trap heat in the lower atmosphere
- 6. Acronym for the Environmental Protection Agency
- 7. One of the most abundant greenhouse gasses
- 10. Heat (thermal) radiation