It would have to be both cultural/political, and technological on that time frame. With current technologies that remove CO2, we could completely remove all of

It would have to be both cultural/political, and technological on that time frame. With current technologies that remove CO2, we could completely remove all of the CO2 we currently add to the atmosphere, without even any reduction in our use or release of CO2. The cost of such an effort with current technology would be slightly less than, for example, the cost of World War II (adjusted for inflation, etc.). If people cared enough to make huge sacrifices, we could absolutely do it right now. Now the technology to make it effortless, so it happens automatically without people doing anything expensive or difficult? E.g. pulling carbon from the air to make things becomes cheaper and superior to pulling oil from the ground? Indeed, we are a ways from that.