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" ... La Loggia says Trane clients do have the option of moving from HCFC to hydrofluorocarbons (HFC) systems as an interim solution. "However, as was the case with Eurotunnel, our stance is to demonstrate to each potential client that interim HFC solutions would also come under pressure in a matter of years, and that moving to HFO refrigerants by skipping the HFC generation altogether would be the right thing to do." ... "
" ... The largest reductions would come from decarbonizing the electricity sector; developing a “green” ... [+] hydrogen industry; phasing out internal combustion engine vehicles; electrifying buildings; making industry more efficient; and reducing the use of hydrofluorocarbons. (As modeled by the nonpartisan climate think tank Energy Innovation: Policy and Technology.) ... "
" ... There’s just one problem. While refrigerants are terrific for the economy, finding the right solution is a significant scientific challenge. Before the invention of modern refrigeration technology, solutions used for refrigeration included industrial gases like ammonia, sulfur dioxide, and methyl chloride, which can be corrosive, poisonous and even explosive. The industry later developed chlorofluorocarbons (CFCs), which are safer for humans but harmful to the Earth, whose protective ozone layer CFCs degrade. In the 1990s, CFCs therefore gave way to hydrofluorocarbons (HFCs), which aren’t as destructive to the ozone layer, but which nevertheless contribute to global warming due to greenhouse gas emissions that take years and sometimes even decades to dissipate. ... "
" ... Turning the AC on is one solution. But AC has drawbacks: it eats up energy off the grid (hence power cuts in CA); it requires HFCs or hydrofluorocarbons (which the UN says is problematic because HFCs could be 11,700 times more powerful than carbon dioxide); and they’re not terribly efficient (units in Japan and EU have been tested to be more efficient than those in the US). ... "