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James Ephraim Lovelock, (born 26 July 1919) is an independent scientist, environmentalist, and futurist. He is best known for proposing the Gaia hypothesis, which postulates that the Earth functions as a self-regulating system.With a PhD in medicine, Lovelock began his career performing cryopreservation experiments on rodents, including successfully thawing frozen specimens. His methods were influential in the theories of cryonics (the cryopreservation of humans). He invented the electron capture detector, and using it, became the first to detect the widespread presence of CFCs in the atmosphere. While designing scientific instruments for NASA, he developed the Gaia hypothesis.
In the 2000s, he proposed a method of climate engineering to restore carbon dioxide-consuming algae. He has been an outspoken member of Environmentalists for Nuclear, asserting that fossil fuel interests have been behind opposition to nuclear energy, citing the effects of carbon dioxide as being more harmful to the environment, and warning of global warming due to the greenhouse effect. He has written several environmental science books based upon the Gaia hypothesis since the late 1970s.