We've come to expect hight air pollution levels in Beijing and other Asian cities with high traffic levels and surrounded by dirty coal plants, but not in cities using emission-free nuclear energy and lots of bikes and mass transit. So why Paris?
Mar 17, 2014 The New York Times - Europe
31 atmospheric scientists have written a new study on the major component of soot called 'black carbon', long identified with causing respiratory problems - and have shown how it is the 2nd most important agent of climate change after carbon dioxide.
Jan 18, 2013 The New York Times