You might think a gathering of world-renowned talkers would leave a big carbon footprint. You'd be wrong

By Sophia Yan

While the Prime Ministers, Presidents, and CEOs yakked at the World Economic Forum, something strange was happening outside: Carbon emissions around Davos fell. Picarro, maker of the machines used to measure greenhouse gases at the Swiss resort, says that may be because locals flee during the conference.

Graphic by Bloomberg Businessweek; Data: Climmod, Pennsylvania State University