While pollution indicators rose alarmingly in recent years, the agency budget suffered cutbacks.

It known as a pollution indicator because it is not found in areas with high amounts of sulfur dioxide.

The Pollution Indicator Boards classify the level of each pollutant as either safe, hazardous or dangerous.

In 2008, Cambridge, UK researchers (in the MESSAGE project) have teamed with bicycle couriers to measure and transmit air pollution indicators as they travel the city.

Spokesmen for the centerthe few still on their feet-protested that it was utter nonsense, and anyone who doubted it was free to tour the facility, where they would find nothing more dangerous than air pollution indicators and wind-vectoring devices.