Plants and the Atmosphere How does vegetation affect the composition of the atmosphere? Fire in the Forest How do fires affect the atmosphere above, and life within, the forest? Deforestation and Impacts Where is deforestation happening and how does it affect the climate? Forest Monitoring How are tropical forests changing, and how can we tell? Plants and Water How does vegetation affect the hydrological cycle? Plants and People How do forests affect our livelihoods and well-being? Sustainable Agriculture Can agricultural communities farm more sustainably? Biogeochemical Cycles How does vegetation influence chemical cycles? Conservation Biology How do we conserve threatened ecosystems? Trees through Time What can we learn by studying vegetation in the past?