Sheik,
By far the biggest component of green-house emissions comes from the rising average wealth of places like China and India.
Billionaires tend to have 747s parked in front of their mansions, with their 26 Ferraris safely locked away in the garage- the actual output of environmentally harmful substances as a result of this tiny portion of the worlds population is nothing compared to hundreds of new coal-fired electrical plants in China, or millions of Tatas in Dehli and Mumbai.
But what to do? Deny billions the chance of a better life? As you say, the world will change without any help from us! Much more sensible to come up with better alternatives (WHEN will we get real about Nuclear!!)
Global trade is pulling billions out of poverty. Philanthropists like Rockefeller and Gates aren't just giving out bowls of rice- their strategy is to improve the health and education of the poor so that they neither want nor need as many children.
Blocks to trade are blocks to the development of such people- it literally means condemning many children to poverty and early death.
Yes it's annoying that so many are so rich by dint of where they are born, but how far is your and my standard of living above the Global average for exactly the same reason?
BTW, lucid and interesting discussion- keep it up!!