What is montreol protocol?

Question

What is montreol protocol?

Answer 1

The Montreal Protocol on Substances That Deplete the Ozone Layer is a landmark international agreement designed to protect the stratospheric ozone layer. The treaty was originally signed in 1987 and substantially amended in 1990, 1992, 1995, 1997 and1999. The Montreal Protocol stipulates that the production and consumption of compounds that deplete ozone in the stratosphere--chlorofluorocarbons (CFCs), halons, carbon tetrachloride, and methyl chloroform--are to be phased out by 2000 (2005 for methyl chloroform). Scientific theory and evidence suggest that, once emitted to the atmosphere, these compounds could significantly deplete the stratospheric ozone layer that shields the planet from damaging UV-B radiation. Due to its widespread adoption and implementation it has been hailed as an example of exceptional international cooperation.

Answer 2

http://ozone.unep.org/

it is the agreement that has sucessfully  limited chemicals, eg CFCs, that destroy hign level ozone.

Answer 3

The Montreal Protocol is a treaty that was passed in 1988 and went into effect in 1989 that limited the production of and gradually phased out CFC's (chloroflourocarbons) which destroy the ozone layer.  CFC's are (were) non-toxic chemicals used in refrigeration, industrial chemicals, and the manufacturing of styrofoam.  

The treaty has undergone five revisions since this time to account for other chemicals and CFC alternatives that have been found to harm the ozone layer.  It is hailed as a monumental treaty in terms of its success in bringing countries together to abate a serious environmental crisis.

The ozone hole remains a serious environmental concern, but the treaty was successful in severely limiting the production of CFC's worldwide.