There's a book out talking about the "Blue Zones" which are areas where the population stays active and often lives to be 100 years old.
Places like Okinawa, Japan and Sardinia, Italy are not surprising and they have been previously noted, but also mentioned is Loma Linda, California.
Really? I never could have predicted that.
Loma Linda is located here:
I've been there, it's not terribly notable except for being right beside the larger city of San Bernadino. In San Berdu and any city backed up to the San Bernadino Mountains the air is so thick and smoggy that it's oppressive esp. in summer. The air rams right against the mountains and settles down for a nice nap.
I guess air quality doesn't affect aging that much which I find completely remarkable. When I'm in smog I can tell that I'm doing my body some harm - not severe but it's not like fresh mountain or ocean air.