Scienticians have developed a way to scrub CO2 out of the air we breathe, meaning global warming from carbon emissions — like that produced from flying or driving — might be neutralized. It’s not a stand-alone solution to global warming, but if the technology goes into development we might well slow it down to a manageable pace.
That doesn’t mean I’m going to go out and get a Hummer right now, indeed gas is still over $4 a gallon in most places, but the idea that I can tell my hippy friends to shove it when I drive my BMW around means I like this a lot.