500 million households cook over an open fire

Want to see the climate change calendar set back by a decade or two?  And at a cost of only $15 billion?

Wired magazine reports that those households could use "clean stoves," at a cost of only $30 each.  Open fires produce black carbon.  Black carbon is thought to be responsible for nearl half of the 3.4 degree temperature increase in the Arctic since 1890.

It's not always the "big ideas" that can make a big difference.

Photo from Wayne Dixon Photography's photostream at Flickr.