Joe Farman, a geophysicist with the British Antarctic Survey and one of the discoverers of the hole in the ozone layer over Antarctica in the early 1980s, died last month on 11 May. Their results reporting a ‘thinning’ of the ozone layer, which protects the Earth from biologically harmful ultra-violet light, by nearly 50% were published on 16 May 1985 and attributed to the release into the atmosphere of the widely used (including air conditioning,refrigeration and thermal insulation) category of chemicals known as CFCs. Such was international concern that the Montreal Protocol to phase out their use was signed by 24 countries just over two years later in September 1987.
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