Over the past two decades car sharing has become a mainstream transportation mode for over a million users worldwide with organisations now operating in more than 1100 cities across 26 countries and on five continents. Car sharing has developed alongside significant intellectual currents...

The Daily and Ehrlich article presents, as expected, a detailed account of the myriad interrelationships between development, global change (notably population growth and global warming), environment and disease. It is a first-class exposition of what we know, and it would be invidious to raise...