Which of the following would decrease overall atmospheric CO2? (select all that apply) 10 pts 1. Decrease the number of carbon sinks by cutting down trees or other plants

2. Increase the number of carbon sinks by planting trees or other plants

3. Decrease fossil fuel burning from factories, cars and other transportation

4. Increase fossil fuel burning from factories, cars and other transportation

5. Decrease the number of organisms in the biosphere

6. Increase the number of organisms in the biosphere

7. Decrease in volcanic eruptions

8. Increase in volcanic eruptions

9. Decrease in forest fires

10. Increase in forest fires