[tempsolution]

There needs to be a new international law that classifies nations who deliberately destroy nature as "at war". The idea is simple: Wrecking your local environment is not a local action. It affects the entire planet and should be seen tantamount to war. This will likely pretty much put a lot of nations into the war section... Then negotiations can continue from there.

While military action is not feasible and in this case counterproductive, aggressive sanctions might help. Sanctioning these nations back into stone age if they don't change their course...

Right now, there is no accepted means to stop this from happening.