I'd say the co2 emissions example you quote makes more sense. That's simply "you're asking me sacrifice X in exchange for a benefit Y where Y is very small [bec

I'd say the co2 emissions example you quote makes more sense. That's simply "you're asking me sacrifice X in exchange for a benefit Y where Y is very small [because my country emissions are less than 1/30 of China's]". Co2 emissions are also global and influence some areas of the world more than others; a nuclear fallout would hit primarily France, even though neighbours would be affected as well.