"ජේම්ස් ලව්ලොක්" හි සංශෝධන අතර වෙනස්කම්

=== CFCs ===

[[Image:AYool CFC-11 history.png|thumb|200px|right|Reconstructed time-series of atmospheric concentrations of CFC-11<ref>Walker, S.J., Weiss, R.F. and Salameh, P.K. (2000) Reconstructed histories of the annual mean atmospheric mole fractions for the halocarbons CFC-11, CFC-12, CFC-113 and carbon tetrachloride. ''Journal of Geophysical Research'' '''105''', 14285—14296.</ref>.]]

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<ref name=lovelock71 />. 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<ref name=lovelock73 /><ref name="ages_gaia">Lovelock, J.E. (1989). ''The Ages of Gaia''. Oxford University Press, Oxford, UK. ISBN 0-19-286090-9.</ref>. 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"<ref name="ages_gaia" />. He has since stated that he meant "no conceivable toxic hazard".