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Comment Re:Old news (Score 1) 43

Just look at a reference like https://en.wikipedia.org/wiki/...

R-12 (aka Freon) was phased out due to its ozone depletion potential, but it also had terrible global warming potential. The main issue is that it would persist in the upper atmosphere for hundreds of years.

R-134a is its replacement which has zero ozone depletion potential, but still a significant global warming potential.

Finding replacement for this, you see a lot of manufacturers accepting the risk of using a flammable gas and going with something like R-600a, which is literally just propane... not fluroinated, vastly inferior in terms of compressibility and its ability to carry away heat, but it works.

The real issue is industrial applications. I feel like that's largely glossed over and emissions are largely from industry, whereas consumer-level systems are just a small portion.

Comment Old news (Score 3, Informative) 43

Of course it would help. Just look at a refrigerant chart for global warming potential. A lot of the older ones have already been phased out to reduce ozone depletion potential, but their replacements were almost as bad in terms of global warming potential, which we weren't as worried about at the time.

For example, R-12's high ozone depletion potential also had an extremely high global warming potential, but its replacements like R22 and later R134a are still relatively high for global warming potential. These are being replaced with R600a (isobutane, which is flammable) and R1234yf, which is a blend of gases that have very different maintenance requirements due to partial pressures (one gas can leak out over time but leave the others, making the mixture less efficient and then you'd have to purge and replace the entire charge, not just top it up). It's a complex issue.

As we know more about these gases, hopefully we can resolve this... Obviously the sooner, the better.

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