As with most efforts this grand in scope, the success of this type of proposal hinges on political acceptance and support. For example, in regards to the Paris Climate Accord, the Trump Administration withdrew the US from participating in the agreement.
In response to withdrawing from the accord, Trump stated “First of all, it was a terrible deal for the US. If they made a good deal there’s always a chance we’d get back. But it was a terrible deal for the US. It was unfair to the US. I believe in clean air. I believe in crystal-clear, beautiful … I believe in just having good cleanliness in all. Now, with that being said, if somebody said go back into the Paris accord, it would have to be a completely different deal because we had a horrible deal.”
Despite those protestations, the Trump administration said this year that a return to Paris Climate Accord was possible at a future date. Regardless, the actions of the Trump administration serves to reinforce the notion that successful efforts at conservation and combating climate change requires global participation and cooperation.