English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

2006-08-05 21:06:01 · 10 answers · asked by Sarah 1 in Science & Mathematics Chemistry

10 answers

The United States and several other countries have banned CFCs which are the main reason for the Ozone depletion. The Chlorine in these molecules breaks apart the Ozone and turns it into oxygen. The same thing happens with Bromine in some other compounds. Some countries are also looking to ban these bromine containing compounds (I think its methyl bromide). Also HCFC's have replaced CFCs but still may be harmful to the Ozone layer, but not as much as CFCs.
The Ozone levels will continue to stay low for some time though as the levels of Chlorine in that layer will remain elevated for some time. After that things will start getting back to normal (unless humans screw up again).

2006-08-05 21:13:22 · answer #1 · answered by ? 4 · 0 0

Chlorine is the culprit, from the chloroflurocarbons that were abundant in the 1980s. It is substituted into molecular oxygen rather than the oxygen atom that forms the triox ozone. Banning CFCs has helped, but not much else. Ozone is depleting and the holes in the layer are increasing over australia and worryingly the antarctic which was once the cleansest place on planet.

2006-08-06 12:20:50 · answer #2 · answered by Allasse 5 · 0 0

None - there is nothing mankind can do actively to "repair" the ozone layer. The only thing that can be done is stop adding substances that destroy the ozone to those altitudes.

Any measure to stop emissions of chlorinated and fluorinated hydrocarbons will not reduce the amount of chlorine atoms up there quickly.

The chlorine atoms enter and interrupt the chain reaction of oxygen radicals that turn O2 into O3 by forming ClO instead, which will form O2 and Cl when contacting O3.
As long as there is Cl up there, the ozone layer will be weakened. Since gas exchange of particles of similar mass (Cl radical 34 or 36, O2 molecule 32) is extremely slow across atmospheric boundaries, the Cl up there will last for a generation or three before leaving.

2006-08-06 04:24:49 · answer #3 · answered by jorganos 6 · 0 0

they banned certain things used in car air conditioners (CFC's) and those in aerosol cans (they banned aerosol cans).

They also told volcanoes to stop erupting, as they were making a far bigger hole in the ozone layer than anything man could do.

Mount Pinatubo, when it erupted, made a far bigger hole than any that man had put there.

Only a few volcanoes listened, tho'. . we still had some eruptions, but mostly they weren't harmful, so the ozone is coming back. .

(at least til the next eruption, anyway).

We need to get the EPA to just ban volcanoes, then we won't have to worry about the ozone layer anymore.

All of this stuff is cyclical, of course. The Ozone hole(s), "global warming". . etc. . it comes and goes, and nothing man can do will change it, so don't buy all the Al Gore hype that is bent on destroying the US and all that it's built on. Think for yourself. Don't let Al do your thinking for you. You should be smarter than that.

2006-08-06 04:10:10 · answer #4 · answered by Wayne A 5 · 0 0

The action was Bush refused to sign a global agreement that was going to reduce all the chemical products that hurts the OZONE.

2006-08-06 04:10:34 · answer #5 · answered by guy_from_there 3 · 0 0

Mostly, Freon and other ozone depleting CFS's (but mostly just freon) have been banned in commercial production processes.

The ozone layer is slowly growing back.

2006-08-06 04:09:38 · answer #6 · answered by ymingy@sbcglobal.net 4 · 0 0

None are required, the holes in the ozone layer are getting smaller...

2006-08-06 04:10:12 · answer #7 · answered by Anonymous · 0 0

reduce the uses of cfc and increasing the uses of compressed natural gases and hydrogen fuels, solar fules

2006-08-06 04:12:11 · answer #8 · answered by senthil k 1 · 0 0

they are slowly trying to remove cfc's in the world by substitutes for them

2006-08-06 04:18:08 · answer #9 · answered by Ashwin K 2 · 0 0

No more fluorocarbons or whatever that stuff was that made spray can work.

2006-08-06 04:10:02 · answer #10 · answered by jewingengleman 4 · 0 0

fedest.com, questions and answers