Environmentalism today IV

In 1979 former NASA scientist James Lovelock published Gaia: A new look at life on Earth, which put forth the Gaia Hypothesis, that life on Earth can be understood as a single organism. This became an important part of the Deep Green ideology. Throughout the rest of the history of environmentalism there has been debate and argument between more radical followers of this Deep Green ideology and mainstream factions.
Environmentalism has also changed to deal with new issues such as the theory of global warming and genetic engineering.