UGC NET Paper 1 GA 2015 June Solved Paper

It includes five main pollutants like air particulate, ground-level gas density, carbon monoxide gas content, sulphur dioxide content and gas content. Many countries monitor ground-level ozone, particulates, sulfur dioxide, carbon monoxide and nitrogen dioxide, and calculate air quality indices for these pollutants. The definition of the AQI in a particular nation reflects the discourse surrounding the development of national air quality standards in that nation.