Dendrology, Climatology, Ecosystem dynamics, Environmental sciences, Ecosystems, Trophic levels, Deciduous trees, Zoology, Biogeography, Timberlines, Biology, Ecotones, Heterotrophs, Botany, Environmental studies, Trees, Hardwood trees, Ungulates, Forest mensuration, Plant ecology, Forest ecology, Biomes, Ecology, Climate models, Mammals, Atmospheric science...
CO2, CO 2, global warming, climate change, greenhouse effect, greenhouse effect gases, emisiones de gases de efecto invernadero, carbon dioxide