Carbon footprint

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Across
  1. 4. The amount of particles per volume
  2. 5. Average weather conditions over a long period of time
  3. 6. Areas of land which are permanently frozen
  4. 7. The change in temperature that occurs every year is called annual __________
  5. 9. Average temperatures increasing across the world
  6. 13. The ability to be maintained at a certain rate or level
  7. 14. The complete disappearance of a species from Earth
Down
  1. 1. The total amount of greenhouse gases generated by your actions is your carbon _________
  2. 2. A positive ________ loop enhances its effect by its own influence
  3. 3. Matter, burned to release energy, made from plants and animals trapped in the Earth's crust
  4. 5. The chemical process where a substance reacts with oxygen and gives off heat
  5. 8. A __________ gas traps heat in our atmosphere
  6. 10. A greenhouse gas, almost 100x more potent than CO2
  7. 11. The day to day state of the atmosphere
  8. 12. A restriction on the total amount of greenhouse gases that can be emitted