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ozon layer is first identifyed
the ozone layer was first identifyed and discoved in 1800 -
ozone
The Ozone shield protects the earth from much of the sun's harmful radiatio and helps keeping the earth more insulated -
more discovery
was discovered by by Christian Friedrich Schönbein in 1839 - 1840 Gordon Miller Bourne Dobson did who did important work on ozone -
ozone layer
The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson -
measuring ozone
a british scientist, G.M.B Dobson measuring the amount of ozone in the atmosphere. -
antartica
Antarctica was first noticed in the 1970s by a research group -
banned
the use of CFC propellants in spray cans was banned in the U.S. In the 1980s -
Montoring the atmoshphere
Between 1981 and 1983, a research group from the british antartic survey was montiring the atmospher -
measurments
the first measurements were taken in 1985 -
the ozone hole
the ozone hole was discovered in 1985 it is a thinning of the layer near the poles of the ozone during winters. The cause is the lack of energy from the sun reaching the layer. Ozone is being destroyed -
Period: to
activites
Evidence that human activities affect the ozone layer has been building up over the last 20 years -
CFC's
chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, and it destroys the ozone layers