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6.2 Stratospheric Ozone (The Montreal Protocol (an international agreement…
6.2 Stratospheric Ozone
Good layer of ozone
-
-
-absorb UV rays
-splits into oxygen molecule and
oxygen atom
-oxygen atom react w another ozone molecule
-produce 2 oxygen molecules
-
The Montreal Protocol
an international agreement to phase out
the production of ozone-depleting substances
- 197 countries ratified the agreement
AIM
- freeze consumption and production of
many CFCs and halons by 1990
- strongly reduce consumption and production
of these substances by 2000
Distinction between MEDCs and LEDCs
- LEDCs got more time to implement the treaty
China and India still producing and
using huge amounts of CFCs.
need for fridge and and AC growing
quickly due to fast economic growth.
Significance
- best example of international
cooperation on an env. issue
- an example of precautionary principle
in science-based decision making
- many experts in their diff. fields coming together
to overcome problem n' find solutions
- the first w regulations that were carefully monitored