I think there will have to be a market for removing CO2 from the atmosphere. I honestly don't have hope that humanity is smart enough to estimate the consequenc

I think there will have to be a market for removing CO2 from the atmosphere. I honestly don't have hope that humanity is smart enough to estimate the consequences of global warming and act optimally. The biggest problem is that the richest countries will suffer the least from warming and some will even benefit. More likely, I think a 3rd world country will realize how cheap and easy it is to pump sulfur dioxide into the atmosphere. Sulfur dioxide cools the planet at a ridiculously low cost but then you get things like irritated lungs and acid rain. For some country, the costs of warming will outweigh the costs of using such a harmful approach and this country will be able to act unilaterally. The threat from using sulfur dioxide may be enough to push countries who only marginally suffer from global warming to actually do something. I don't think it's possible to combat climate change without immediate and present danger.