Use smartphone to read the pollution

US scientists say they have deployed a team of mobile pollution sensors that provide real-life information about air quality to smartphone users in the region.

>>> Smartphone through the wall

Researchers at the University of California at San Diego in the US say that CitiSense sensors are especially useful for people with chronic conditions like asthma who need to stay away from pollution.

Just 100 sensors are enough to gather weather information in a wide area. For example, San Diego County has about 3.1 million inhabitants, over 10,000 area ^2, and just about 10 such mobile station.

'We want to have more data, and more accurate data, to be able to deliver to the community,' ' esciencenews.com quotes William Griswold, UC San Diego computer science professor, project leader. .

In the test, experts distributed the sensor to about 30 people in their backpack in four weeks in San Diego County.

CitiSense sensors can detect ozone, nitrogen dioxide and carbon monoxide, the most common pollutants released from vehicles.

And smartphones can display those indicators by using the American Environmental Protection rating scale, from green (good) to violet (dangerous).