Hagedorn et al.
Elevated CO2 and N deposition on dissolved organic carbon

Huesemann et al.
Oceanic disposal of CO2 and its effect on nitrification

Ojala et al.
Response of an aquatic plant to elevated CO2

Van Kessel and Van Kesteren
CO2 from artificial sludge depots

Petela et al.
Ironmaking and CO2 emissions

Kabwe et al.
CO2 fluxes from the soil surface

Liikanen et al.
CO2 in eutrophic lakes

Moore et al.
CO2 exchange in a bog

Davis et al.
Elevated CO2 and pine community structure