Carbon cycle (Biogeochemistry) Chemical oceanography 2 Atmospheric carbon dioxide 1 Atmospheric carbon dioxide-Environmental aspects 1 Atmospheric physics 1 Biom�edecine 1 Carbon dioxide 1 Carbon sequestration 1 Carbon--Isotopes 1 Chemistry 1 Climatic changes 1 Climatology 1 Earth sciences 1 Ecology 1 Environmental 1 Geochemistry 1 Land use-Environmental aspects 1 Landscape changes 1 Nitrogen cycle 1 Plant-atmospheric relationships 1 SCIENCE 1 Sciences de la vie 1 Soils 1 Vegetation and climate 1