Chemistry of the atmosphere

123456789
Across
  1. 1. the pollutant that causes global dimming
  2. 5. the greenhouse gas released by farming cattle
  3. 7. the gas that makes up 79% of the atmosphere
  4. 8. the gas that makes up 19% of the atmosphere
  5. 9. the process of cutting down trees
Down
  1. 2. the greenhouse gas that is released from burning fossil fuels
  2. 3. the pollutant that can contribute to acid rain
  3. 4. oxygen started to be released into the atmosphere when plants started to carry out the process of ________
  4. 6. millions of years ago, carbon dioxide was released into the atmosphere by _______