Kenneth Caldeira (born 1960) is an American atmospheric scientist. His areas of research include ocean acidification, climate effects of trees, intentional climate modification, interactions in the global carbon cycle/climate system, and sustainable energy.As of 2021, Caldeira is Senior Scientist in the energy research company Breakthrough Energy, Senior Staff Scientist (emeritus) in the Carnegie Institution for Science's Department of Global Ecology, and Professor (by courtesy) in the Stanford University Department of Earth System Sciences. Source: Wikipedia (en)