An example of the level of ignorance comes from a TV comical chat show.

An expert was asked about the suggestion of painting your roof white. Audience laughter was immediate. The expert explained in words that wouldn't frighten the idiots, so he avoided the word albedo.

The problem with a white roof is keeping it clean. Which is the real reason it would not be popular. Better to fit PV and make use of the energy falling there.

The only way to get society better on board is when the cost of food rises appreciably. It will happen, we pay about 11% of income on food. 50 years ago that was 20%.
As the tropical regions advance north and plants traditional grown suffer less yield in a warmer climate prices will rise. Slowly , but inexorably. We will eat different foods, but will they be as nutritious?
TED Talk predicting tipping point at 10 years and she talks in units of calories, not tonnage. A far more revealing measure

It is an obscene irony that the deniers, even the intelligent ones are relying on science to come to the rescue. It already is - it is warning deaf ears.
Prevention is better than cure. And cure is at best a sticking plaster.