Maybe we should focus on the man made global warming first.
Despite my view that we, humans, are responsible for global warming, or at least an acceleration in global warming, I actually dont believe we will stop it from happening, not because we cant, but because there is no real collective will around the world to solve it, everyone wants to just blame someone else and point the finger, unfortunately farming is bearing the brunt of that finger pointing at the moment, unfairly in my opinion.
In order for a global reduction in emissions to be achieved, whole economies would have to suffer.
Economies are built on oil and gas production, manufacturing, agriculture, tourism etc, all these have a hefty carbon footprint.
Even countries that claim to have a low carbon footprint, like costa rica, rely on large numbers of tourists visiting their country to keep the economy going, tourists mean flights, flights mean planes, planes mean emissions.