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Ozone pact helped cool the planet.


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Signed in 1987 and implemented in 1989, the Montreal Protocol committed signatories to scrapping a group of chlorine- and bromine-containing chemicals.

Used in aerosol sprays, solvents and refrigerants, these substances destroy ozone molecules in the stratosphere that filter out cancer-causing ultraviolet light.

 

http://news.yahoo.com/ozone-pact-helped-cool-planet-231418826.html

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