Seems like green and healthy anything doesn't seem to work as well... hmm.
R12 - low pressures, great range of applications, can't be beat,
R11 - excellent low pressure refrigerant, awsome solvent
asbestos - awsome insulating properties - floors, ceilings, pipe wrap, duct tape, brakes...
lead paint - goes on smooth, lasts for years
leaded gas - cool, smooth running engines
mercury - switches, t-stats, flourescent lamps, on and on and on... and fun to play with... mmmwahahaha...
Use that smelly Stove Bright paint while you still can because I guarantee you what ever they come out with next won't kill you, give you cancer, cause global warming, kill polar bears, and it won't work that well either.
Don't get me wrong - I like my health and the planet, but I wish sometimes there was some middle ground - that we could still have the tools that get things done.