Better air measure gauge on way

GUANGZHOU: The Guangdong provincial environmental protection agency is working on a system to better evaluate its air quality.

The new system will include indices on visibility, particle mass concentration of PM10 (particles with a diameter of less than 10 microns), and black carbon particles, Nanfang Metropolis Daily reported yesterday.

"The present air quality evaluation system was devised 20 years ago. It only includes indices on sulfur dioxide, nitrogen dioxide, and inhalable particle matters of PM10," Liu Guoxian, an official with the provincial environmental agency, said.