This is the headline:

The president’s new science adviser said Wednesday that global warming is so dire, the Obama administration is discussing radical technologies to cool Earth’s air.

John Holdren told The Associated Press in his first interview since being confirmed last month that the idea of geoengineering the climate is being discussed.

One such extreme option includes shooting pollution particles into the upper atmosphere to reflect the sun’s rays. Holdren said such an experimental measure would only be used as a last resort.

“It’s got to be looked at,” he said. “We don’t have the luxury of taking any approach off the table.”

They’re borrowing from the concept of global cooling.  Volcanos often send so much ash into the atmosphere it will cool the Earth for a while.

Meanwhile, we’ve had this happening in Alaska:

And, we’re experiencing this in Chile:

I don’t think Obama’s team needs to be worrying too much about sending particulates into the atmosphere, the Earth does that just fine.

Additionally, if they DO send particulates into the upper atmosphere, and then we do have serious volcanic activity, the consequences could be a lot more severe than doing nothing.  Given my druthers, I’d just as soon they not mess with the atmosphere until we have a better grip on what’s going on up there.