(Steven Hayward) Assume for the purposes of discussion that catastrophic global warming from human CO2 emissions can be reliably predicted. Here's a thought: since we know trees sequester carbon (but couldn't be planted on a scale large enough to mitigate 30 billion tons of annual CO2 emissions), why not go one step further and investigate whether there might be technologies that would remove carbon dioxide from the air? The idea is called
Source: Power Line