The point isn't changing other countries. The point is giving competing green technologies a fighting chance.
I don't care whether Saudi Arabia suffocates in cheap oil or builds a hi-tech green energy paradise. That's their choice. But I don't want the local green energy startups and organic farms be driven out of business by cheap Saudi-Arabic oil. Same with China - I think it's fundamentally unfair that local businesses have to abide to many regulations (e.g. environmental, safety, hiring) that Chinese companies don't need to, yet they are able to compete in the same market offering lower prices.
I think that the current implementation of free trade is a fundamentally failed and morally wrong model.
China's population is 4.3 times that of the USA, but they only burn 1.3 times as much coal. In other words, the average American burns nearly 4 times as much coal as the average Chinese person.
http://www.nationmaster.com/country-info/stats/Energy/Coal/C...
2. The problem is to change the behavior of billions of people, and many will find it inconvenient (to varying degrees). Of course it's gonna be political. These days I end up regarding anyone proposing "de-politicization" with suspicion, because "getting the politics out of it" is a great way to ensure that whatever solution we can apply is delayed by years.
3. The same for geoengineering. I know some people are sincere, but in many cases it sounds too much like "There must be a unicorn technology that will solve the problem without us paying the price. If it's not there yet, we just have to wish it harder."
We've basically imposed the "taxes on imports from said country, or ban those imports" on North Korea, with the result that they use the worst of environmental practices:
• Inefficient small coal-burning fireplaces in outlying areas. (Pyongyang is better.)
• Regulatory environment where factory and vehicle emissions are not even close to a priority.
• Unsafe nuclear testing.
Ok, so that was my straw man :) Hopefully it illustrates something more universal, namely:
Many countries lack the internal political will to put meaningful environmental clean ups in place. Even something as simple as the tax you proposed to pay for environmental clean up of disaster areas is impossible due to politics.
Until we have de-politicized the topic, that probably won't change. New clean tech is one great way of accomplishing this.