Here's the article, a useful read for all those wishing to go and work in big cities:-
"Scientists link 24,000 deaths with air pollution in California
LOS ANGELES (Xinhua): Air pollution might be blamed for as many as 24,000 deaths annually in California, according to figures released on Thursday.
The deaths are probably due to chronic exposure to fine particulate pollution, according to the California Air Resources Board (CARB) which released two studies in this area.
The figure triples the previous official estimate of 8,200, the CARB said.
The revised figures are based on a review of new research across the nation, including by Los Angeles-based researchers, about the hazards posed by microscopic particles, which sink deep into the lungs.
"Our report concludes these particles are 70 percent more dangerous than previously thought, based on several major studies that have occurred in the last five years," CARB chief researcher Bart Croes said.
The studies, including one by University of Southern California tracking 23,000 people in greater Los Angeles, and another by the American Cancer Society monitoring 300,000 people across the United States, have found rates of heart attacks, strokes and other serious disease increase exponentially after exposure to even slightly higher amounts of metal or dust.
It is difficult to attribute individual deaths to particulate pollution, Croes said, adding that long-term studies that account for smoking, obesity and other risks have increasingly zeroed in on fine particulate pollution as a killer.
"There's no death certificate that says specifically someone died of air pollution, but cities with higher rates of air pollution have much greater rates of death from cardiovascular diseases," Croes said.
Californians exposed to high levels of fine particulates had their lives cut short on average by 10 years, the board staff found."
taken from:-
http://www.hindu.com/thehindu/holnus/003200805231024.htm