Gasses for refrigeration have to be very reactive otherwise the pumps would have to be huge and chew loads of energy.
Reactive gasses all tend to have rather odious side effects. The next one chosen will have some other problem. Such is life.
It's funny how the world reacts isn't it. Ozone, real in your face problem right now. You could get cancer from the sun if we don't have Ozone. Got to fix it, regulations made, refrigerant changed, disposal regulations sorted, done.
Just as it should be right?
CO2. Now there's a problem. Not in your face, not going to kill you or give you cancer, nothing will happen in the next decade unless you regard the chance of being swamped by a monster hurricane, at some time, to be a real issue.
However CO2 will make the climate uninhabitable for 70% of the world's population. that means 2 out of every three of your family and friends children or grandchildren or great grandchildren (depending on what date you think it will really happen), will not survive it.
What is being done about CO2? A hell of a lot of hot air (pun intended), and not a whole hell of a lot of anything else. Loads of money being made but no real movement on the amount of CO2 we emit. As the Global CO2 graph shows.
August 2016: 400.47 ppm
August 2015: 396.85 ppm
Does that sound like a reduction to you? That graph shows that we have likely reached the bottom of the 2016 cycle and will now rise again. I thought that we might dip into 3xxppm one more time before leaving it behind forever (in human terms, 110 to 15 thousand years is "forever"). But the massive rise in 2015 at 2.9ppm is continuing. Year on Year, August is a 3.6 ppm rise which is why it has not dropped below 400ppm.
There is an organisation called 350.org which is campaigning for a sustainable biosphere at 350ppm CO2.
Dream on. We'll be knocking on 450 before the politicians realise that it's as urgent as the Ozone problem. Then it will be many decades too late to take the action needed because CO2 is self reinforcing and also everything we do to mitigate it will produce more CO2.