I am an asthmatic. Walking or biking behind a black-smoke-belching truck makes me choke, I mean really choke. I am sure it sounds familiar to other asthmatics or to those who have friends with respiratory problems.
The World Health Organization last month classified outdoor air pollution as a leading carcinogen. It particularly singled out particulate matter – the stuff that makes up the black smoke from those diesel trucks – as a carcinogen for humans.
On the heels of that news came word from China that record-air pollution levels nearly shut down one of northeastern China's largest cities, Harbin, forcing schools to suspend classes, snarling traffic and closing the city airport. An index measuring particulate matter reached a reading of 1,000 in some parts of the city, home to some 11 million people. A level above 300 is considered hazardous, while the WHO recommends a daily level of no more than 20.
Imagine the fate of my fellow sufferers, the asthmatics. Needless to say there was surge of hospital emergency room visits in Harbin on October 21.