World warming to greener train travel

Take more trains and fewer planes. That's what Sarah Kendrew pledged to herself a few years ago. An astronomer at the Netherlands' Leiden Observatory, she travels frequently to nearby countries on business -- and prefers to not leave vapor trails in the sky when doing so. "I've been making a conscious effort to take trains rather than fly," she told CNN, "for environmental reasons initially, but I've also found them to be much more comfortable and convenient -- so it's not really an effort anymore." Faced with global climate change, many around the globe -- from governments to companies to individuals -- have also warmed to train travel.