There is no way people will give up air conditioning in the 21st Century. I live in Texas so I know what I am talking about. We need to stop burning hydrocarbons to generate electricity and the problem will no longer be a problem. In one 24 hour period the sun sends enough energy, as light (photons), to meet the present global energy needs for 1,000 years. This allows you to see the scale that is solar. The transition to wind, solar, hydro, etc. is accelerating because the efficiency has gotten the renewables to a price point that is competitive with oil and coal. It is just a matter of time before we mothball old dirty power plants. We burned wood in the boilers in 1750, we burned coal in the 1800's, we burned oil in the 1900's. Unfortunately these old technologies have overstayed their time due to political manipulation. The transition to solar has reached a tipping point and no amount of manipulation by big oil is going to stop it. Have faith, everybody. Better times are on the horizon.