Carbon is measured in gigatonnes. How many tonnes are in a gigatonne?

Which terrestrial ecosystem store contains the most carbon?

How much carbon is currently stored in the atmosphere?

This observatory has been measuring atmospheric carbon since 1958. What is it called?

If more carbon enters a store than leaves it, that store is considered a net..?

Marine and terrestrial plants turn carbon into organic matter by the process of..?

What kind of correlation is there between the temperature of water and the amount of CO2 that can be dissolved?

When calcium carbonate is heated to produce cement, lime and CO2 are produced. How much CO2 does the cement industry contribute to global anthropogenic CO2 emissions?

Which continent produced the largest proportion of agriculture related greenhouse gas outputs (44%), according to the United Nations Food and Agriculture Organisation?