Between discovery of the ozone hole through a

Between 1957 and 1958, the
British Antarctic Survey started to monitor ozone values. In the mid-1970s,
scientists began theorizing that CFCs may lead to the depletion of ozone in the
stratosphere. Three scientists from the British Antarctic Survey, Josh Farman, Brian
Gardiner and Jonathan Shanklin, discovered a recurring hole in the ozone layer
every spring over the Antarctic, in 1984. In 1985, the British Antarctic Survey
discovered that the ozone levels were decreasing every spring over their Halley
and Faraday research stations. In May 1985, these scientists British Antarctic
Survey announced the discovery of the ozone hole through a paper titled
‘Nature’. Part of it explained the introduction of the Montreal Protocol that
would ban the production of CFCs. Scientists report that the hole has been
opening since the 1970s. According to NASA, from 1978 to 1991, the net decrease
of global ozone is 3% per decade and per 1% decrease of ozone, 2% of
ultraviolet exposure increases (Sparling, 2011). According to The Guardian,
John Shanklin, a British Antarctic Survey scientists, in the first week of April
2015, said “Yes, an international treaty was established fairly quickly to deal
with the ozone hole, but really the main point about is discovery was that it
shows how incredibly rapidly we can produce major changes to our atmosphere and
how long it takes for nature to recover from them.