What is sars? Is sars fatal? Can living in a big city increase the risk?

SARS. I'd be more concerned over the smog than sars. But to answer question sars is severe acute respiratory syndrome (sars) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. It carries a very high mortality. Just go and be happy in the city..Live your life..Worrying only shortens it.
No. There were no sars cases detected in the world since 2004, according cdc website. So relax, don't worry about sars.