Literally.
“Several German automakers, including BMW, Daimler and Volkswagen, have expressed skepticism toward a European Union mandate telling the firms that their in-car air-conditioning systems must be more environmentally friendly. In particular, they are being pushed into deploying a more politically correct refrigerant known as R-1234yf, which regulators insist is perfectly safe. Daimler, maker of Mercedes-Benz sedans, raised the alarm when the firm’s own testing revealed the substance increases the risk of vehicle fires. ‘In the new real-life test scenario, the refrigerant is dynamically dispersed at high pressure near to hot components of the test vehicle’s exhaust system,’ the company explained in a statement last year. ‘This corresponds to a serious head-on collision, in which the refrigerant line is severed and the reproducible results demonstrate that refrigerant, which is otherwise difficult to ignite under laboratory conditions can indeed prove to be flammable in a hot engine compartment.'” [Washington Times]
Seriously, what’s more important? Saving a few lives, or holding the earth’s temperature down .0000000001 degree?
Since it’s human lives, obviously holding temperature down.