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- Ecology[remove]28
- Climatic changes7
- Marine ecology6
- Environmental sciences4
- Paleoclimatology4
- Biogeochemistry3
- Remote sensing3
- Vegetation and climate3
- Carbon cycle (Biogeochemistry)2
- Microbiology2
- Oceanography2
- Photosynthesis2
- Plant phenology2
- Science--Social aspects2
- Songbirds--Migration2
- Triatoma2
- Vegetation surveys--Remote sensing2
- Agriculture1
- Air--Pollution1
- Air--Pollution--Health aspects1