> As much as I'd like to see big business curb their carbon emissions, there's simply no way they will be cut back by 75% anytime soon.
Individuals do not have any significant influence, the industries need to cut back. The industries only exist to make stuff for people to buy. I am going to present the obvious, naive solution that everyone seems to be ignoring. Cut back your spending by 75%. Every dollar you spend eventually becomes oil and is burned by big business. In the words of Don Lancaster (1), "It is both a valid and useful concept to think of 'using dollars' as 'spending gasoline'".
The thing is that global warming doesn't have an on/off switch. If we cut back emissions by 22%, then we're slowing down the global warming process significantly. As much as I'd like to see big business curb their carbon emissions, there's simply no way they will be cut back by 75% anytime soon.