The only realistic solution from global warming will not come from government action, or attempting to force nations into economic untenable positions that have the effect of lowering living standards for their populations.
The only realistic solution is via technological innovation where by coal, oil, etc are made obsolete by natural market forces, not artificial tax schemes, fines, or other such agreements.
People that continue down the path that making these fuels more expensive by artificial government actions will continue to be disappointed in the results, as people need to heat their home, move goods, etc and they will always want do to that by the cheapest means, injecting government policies that simply increase prices of those basic needs of society to make alternatives more attractive will never ever be popular with the majority citizens of any nation which is why nations look to water down the language.
This is a PR event with no substance, like most international agreements.