Google now tracks air pollution when mapping streets

In Oakland, California, the Google cars that collect maps and photographs of city streets have also been collecting air, and measuring pollution block by city block.Melissa Lunden is the chief scientist for Aclima, the company that built the pollution sensing equipment added to Google's Street View cars."These are sampling gases like ozone, NO, NO2, CO2, methane," Lunden says. "You see the traffic, you see the streets, you can see the air pollution. That data is uploaded to the internet in real