This is rather an imaginary answer.
- Short term: Resorting to renewable and clean energy sources, and population control.
- Long term: Inhabiting in other planets/moons.

There is no answer as long as there is reality denial.

No solution

A drastic change in lifestyle for everyone on the planet ensuing extreme environmental protection laws being put into place as soon as possible. Placing environmental regulations on every country on Earth, or at least on the worst offenders, may require the instatement of a one world government.

A bunch of really big AC units, DUH

Accelerated industrialization. Bring the third world up in terms of infrastructure and employment standards, increase productivity, technological advancement, and absolute brainpower. The solution will naturally arise over time.

the first thing is that profits would have to take a backseat - so no, there is no answer

Goethe knew the answer: If everyone sweeps before his own front door, then the street is clean.

Well Daniel, if you would stop asking about it, we send it our thoughts and prayers, and then proceed to ignore it, maybe it will all just go away?

Nuclear, more renewables, less fossil fuels, and electric vehicles. We're already seeing this transition it just isn't happening fast enough.