12
Computare
What Can we do? Global Carbon Cycle
Compliments: http://earthobservatory.nasa.gov/Library/CarbonCycle/carbon_cycle4.html
(20,000 Mtonnes CO2)
Let's go back to the Global Carbon Cycle for a minute. It provides seeds for some important ideas.

About half the fossil fuel carbon dioxide emissions do not show up in the atmosphere - maybe absorbed by  the oceans or vegetation.

Vegetation absorbs a lot of carbon dioxide - thus the concept of sinks to remove it from the atmosphere.

Much of earth's carbon is sequestered from the atmosphere in soil, fossil fuel and sedimentary rock deposits - thus the idea we might be able to sequester carbon dioxide in soil, underground in emptied oil reservoirs - or even turn it into rocks.