The solar energy industry has to innovate so hard and so fast (the solar energy Moore's Law?) with prices coming down by half every two years that dirty energy is simply priced out globally.
That is the best way forward.
The planet can not be hostage to whether or not a White House occupant will try to walk away from the Paris Agreement.
The political people though should agitate to end all the subsidies to dirty energy. There is too much corporate welfare going on.