Ambient air quality indexes and standards for vegetable growing in greenhouses

The key points of choosing the evaluation indexes and determining maximum limited values of the toxic substances in greenhouse ambient air for vegetable growing were discussed in this paper, PM₁₀, SO₂, NO₂, Pb, Fluoride, CO, BaP, NH₃, Cl₂, C₂H₂ were selected as the evaluation indexes, and their maximum limited values were given. Comparing with the correlative criteria of WHO, America, Canada, Australia and other countries, taking account of the status quo in China, the maximum limited values of each toxic substance were given by the author.