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message 1: by Jimmy (new)

Jimmy | 1613 comments Mod
from the Washington Post:

CFC-11 is part of a group of ozone pollutants that were banned under a 1987 accord, but emissions have risen 25 percent since 2012, scientists reported Wednesday.

Scientists say the most likely explanation is that a manufacturer is producing the chemical without reporting it to authorities. It's a distressing development for what's commonly seen as a global environmental success story, in which nations — alarmed by a growing “ozone hole” — collectively took action to phase out the chlorofluorocarbons driving the depletion.

message 2: by Robert (new)

Robert Zwilling | 2193 comments Looks like artificial cooling is a big can of worms.

Article about mysteriuos ozone increase over last 5 years:

Two of the substitutes for the CFCs, are HCFCs and HFCs which also attack the ozone. The thinking was that because they were less stable than the CFCs, they would break down into substances that wouldn't attack ozone before reaching the upper atmosphere. This turned out not to be true.

Canada is phasing out the consumption of HCFCs by 2020 except for HCFC-123 which will be prohibited in 2030. Use of up to 0.5% of HCFCs in refrigeration and air conditioning equipment will be allowed until 2030. Its a standard agreement most countries plan on following.

Besides being more expensive some of the substitutes are flammable.

The hydrocarbon substitutes are being slowly banned because they create greenhouse gasses which accelerate climate warming.

Spices are for more than just flavoring food. Going to back to preserving foods with spices and other preservation methods might make a comeback. We might not like the past but there were reasons for why things were done the way they were.

message 3: by Robert (new)

Robert Zwilling | 2193 comments The NY Times put some reporters in China where they thought the CFC-11 emissions were originating from. They found one town where the factories were using it, mostly producing foam.

While people claim that the ozone layer is well on its way towards healing itself, it seems strange that one town's industrial output could destabilize the ozone stability so rapidly. Seems more likely we are closer to the edge than previously thought.

message 4: by Ken (new)

Ken Kroes (ken_kroes) | 69 comments Thanks for the updates Robert and Jim,

Where this gets me is that this is a "simple" problem where we know the chemical reaction of CFC's on the ozone and it is taking decades to resolve along with people/countries not following through.

If it takes this long to resolve this, how long will it take for us to get resolution and compliance on the much more complicated topic of CO2/CH4?

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