A lifelong inventor, Lovelock has created and developed many scientific instruments, some of which were designed for NASA in its program of planetary exploration. It was while working as a consultant for NASA that Lovelock developed the Gaia Hypothesis, for which he is most widely known.
In early 1961, Lovelock was engaged by NASA to develop sensitive instruments for the analysis of extraterrestrial atmospheres and planetary surfaces. The Viking program, that visited Mars in the late 1970s, was motivated in part to determine whether Mars supported life, and many of the sensors and experiments that were ultimately deployed aimed to resolve this issue. During work on a precursor of this program, Lovelock became interested in the composition of the Martian atmosphere, reasoning that many life forms on Mars would be obliged to make use of it (and, thus, alter it). However, the atmosphere was found to be in a stable condition close to its chemical equilibrium, with very little oxygen, methane, or hydrogen, but with an overwhelming abundance of carbon dioxide. To Lovelock, the stark contrast between the Martian atmosphere and chemically dynamic mixture of that of our Earth's biosphere was strongly indicative of the absence of life on the planet. However, when they were finally launched to Mars, the Viking probes still searched (unsuccessfully) for extant life there.
Lovelock invented the electron capture detector, which ultimately assisted in discoveries about the persistence of CFC and their role in stratospheric ozone depletion. After studying the operation of the Earth's sulfur cycle, Lovelock and his colleagues developed the CLAW hypothesis as a possible example of biological control of the Earth's climate.
Lovelock was elected a Fellow of the Royal Society in 1974. He served as the president of the Marine Biological Association (MBA) from 1986 to 1990, and has been a Honorary Visiting Fellow of Green Templeton College, Oxford (formerly Green College, Oxford) since 1994. He has been awarded a number of prestigious prizes including the Tswett Medal (1975), an ACS chromatography award (1980), the WMO Norbert Gerbier Prize (1988), the Dr A.H. Heineken Prize for the Environment (1990) and the RGS Discovery Lifetime award (2001). In 2006 he received the Wollaston Medal, the Geological Society's highest Award, whose previous recipients include Charles Darwin [1]. He became a CBE in 1990, and a Companion of Honour in 2003.
An independent scientist, inventor, and author, Lovelock works out of a barn-turned-laboratory on the Devon/Cornwall border.
CFCs
After the development of his electron capture detector, in the late 1960s, Lovelock was the first to detect the widespread presence of CFCs in the atmosphere. He found a concentration of 60 parts per trillion of CFC-11 over Ireland and, in a partially self-funded research expedition in 1972, went on to measure the concentration of CFC-11 from the northern hemisphere to the Antarctic aboard the research vessel RRS
Shackleton. He found the gas in each of the 50 air samples that he collected but, not realising that the breakdown of CFCs in the stratosphere would release chlorine that posed a threat to the ozone layer, concluded that the level of CFCs constituted "no conceivable hazard". He has since stated that he meant "no conceivable toxic hazard".
However, the experiment did provide the first useful data on the ubiquitous presence of CFCs in the atmosphere. The damage caused to the ozone layer by the photolysis of CFCs was later discovered by Sherwood Rowland and Mario Molina. After hearing a lecture on the subject of Lovelock's results, they embarked on research that resulted in the first published paper that suggested a link between stratospheric CFCs and ozone depletion in 1974, and later shared the 1995 Nobel Prize in Chemistry for their work.
Gaia
First formulated by Lovelock during the 1960s as a result of work for NASA concerned with detecting life on Mars, the Gaia hypothesis proposes that living and non-living parts of the earth form a complex interacting system that can be thought of as a single organism. Named after the Greek goddess Gaia at the suggestion of novelist William Golding, the hypothesis postulates that the biosphere has a regulatory effect on the Earth's environment that acts to sustain life.
While the Gaia hypothesis was readily accepted by many in the environmentalist community, it has not been widely accepted within the scientific community. Among its more famous critics are the evolutionary biologists Richard Dawkins, Ford Doolittle, and Stephen Jay Gould ... notable, given the diversity of this trio's views on other scientific matters. These (and other) critics have questioned how natural selection operating on individual organisms can lead to the evolution of planetary-scale homeostasis.
Lovelock has responded to these criticisms with models such as Daisyworld, that illustrate how individual-level effects can translate to planetary homeostasis, under the right circumstances.
Nuclear power
Lovelock has become concerned about the threat of global warming from the greenhouse effect. In 2004 he caused a media sensation when he broke with many fellow environmentalists by pronouncing that "only nuclear power can now halt global warming". In his view, nuclear energy is the only realistic alternative to fossil fuels that has the capacity to both fulfill the large scale energy needs of humankind while also reducing greenhouse emissions. He is an open member of Environmentalists for Nuclear Energy.
In 2005, against the backdrop of renewed UK government interest in nuclear power, Lovelock again publicly announced his support for nuclear energy, stating, "I am a Green, and I entreat my friends in the movement to drop their wrongheaded objection to nuclear energy". Although these interventions in the public debate on nuclear power are recent, his views on it are longstanding. In his 1988 book
The Ages of Gaia he states:
"I have never regarded nuclear radiation or nuclear power as anything other than a normal and inevitable part of the environment. Our prokaryotic forebears evolved on a planet-sized lump of fallout from a star-sized nuclear explosion, a supernova that synthesised the elements that go to make our planet and ourselves."
In
The Revenge of Gaia (2006), where he puts forward the concept of sustainable retreat, Lovelock writes:
"A television interviewer once asked me, 'But what about nuclear waste? Will it not poison the whole biosphere and persist for millions of years?' I knew this to be a nightmare fantasy wholly without substance in the real world... One of the striking things about places heavily contaminated by radioactive nuclides is the richness of their wildlife. This is true of the land around Chernobyl, the bomb test sites of the Pacific, and areas near the United States' Savannah River nuclear weapons plant of the Second World War. Wild plants and animals do not perceive radiation as dangerous, and any slight reduction it may cause in their lifespans is far less a hazard than is the presence of people and their pets... I find it sad, but all too human, that there are vast bureaucracies concerned about nuclear waste, huge organisations devoted to decommissioning power stations, but nothing comparable to deal with that truly malign waste, carbon dioxide."
Climate and mass human mortality
Writing in the British newspaper
The Independent in January 2006, Lovelock argues that, as a result of global warming, "billions of us will die and the few breeding pairs of people that survive will be in the Arctic where the climate remains tolerable" by the end of the 21st century. He has been quoted in
The Guardian that 80% of humans will perish by 2100 AD, and this climate change will last 100,000 years.
He further predicts, the average temperature in temperate regions will increase by as much as 8°C and by up to 5°C in the tropics, leaving much of the world's land uninhabitable and unsuitable for farming, with northerly migrations and new cities created in the Arctic. He predicts much of Europe will become uninhabitable having turned to desert and Britain will become Europe's "life-raft" due to its stable temperature caused by being surrounded by the ocean. He suggests that "we have to keep in mind the awesome pace of change and realise how little time is left to act, and then each community and nation must find the best use of the resources they have to sustain civilisation for as long as they can".
He partly retreated from this position in a September 2007 address to the World Nuclear Association's Annual Symposium, suggesting that climate change would stabilise and prove survivable, and that the Earth itself is in "no danger" because it would stabilise in a new state. Life, however, might be forced to migrate
en masse to remain in habitable climes. In 2008, he became a patron of the Optimum Population Trust, which campaigns for a gradual decline in the global human population to a sustainable level.
