Atmospheric carbon dioxide Climatic changes 2 Carbon cycle (Biogeochemistry) 1 Carbon dioxide 1 Environmental impact 1 Forest ecology 1 Forest plants 1 Forest trees 1 Forests 1 Forests and Forest Trees (Biology and Ecology) 1 Geological carbon sequestration 1 Global warming 1 Greenhouse effect 1 Greenhouse gases 1 Growth 1 IUFRO 1 Ice cores 1 Land use-Environmental aspects 1 Landscape changes 1 Meteorology and Climate 1 Paleoclimatology 1 Plant Physiology and Biochemistry 1 Plants 1 Pollution and Degradation 1 Trees 1 Woody plants 1