Alright, first, let me say, I'm no atmospheric scientist. But, who can tell me about the practicalities here? Let's look at the problems: okay, there seems to be strong consensus that there is global warming. Now the permafrost in Siberia is melting, and threatening to release unheard of quantities of carbon. Now, carbon is one thing and carbon dioxide another, but... well, I'm no chemist, but work with me on this.
Carbon dioxide is processed by plants and released as oxygen. If the carbon released is in the form of Carbon dioxide, or can be easily converted to it, why couldn't be transport some of it to Mars, contained in bubble cities along with plants, and start the process of terraforming. I mean, global warming of Mars would be a good thing, no?