Did anyone advocate that humans stop crapping because water systems were spreading cholera from sewage?
No, they fixed the problem.
Did anyone advocate no longer using refrigerants at all because of the ozone hole?
No, they fixed the problem,
and managed to significantly cut greenhouse gas emissions as well, buying us a lot of time to solve the problem we're debating here.
This is a "taking-out-the-garbage" type problem, in that CO2 and the rest are byproducts of industry. You can either switch to non-fossil fuel sources, bury the CO2, or increase the efficiency of what we use.
As an example of the ridiculously low-hanging fruit in this, the average incandescent bulb converts something like 1 or 2% of the electricity it uses into visible light. Compact flourescents might reach 5%, which is double or triple the efficiency of an incandescent, but still crazily inefficient. Research to get us a bulb with efficiencies that don't make us exclaim in astonishment is, of course, underway.
Or, you could turn off the lights and make do with candles. I'd rather use electric bulbs, though, thank you.
Also, of course, research continues into making a/c more efficient every year as well.