Muhammatovich, Halmatov MusliddinSharibxodjae, Ismoilxodjayev BokhodixodjaАbdumanabovich, Sulaymonov SharifjonMahamatyusup, Latibov Shohruhbek2019-12-062019-12-062019-10Muhammatovich Halmatov Musliddin, Sharibxodjae Ismoilxodjayev Bokhodixodja, Аbdumanabovich Sulaymonov Sharifjon, Mahamatyusup Latibov Shohruhbek. The Influence of Harmful Substances on the Pigments of Leaves of Decorative Trees. Annual Research & Review in Biology. 2019 Oct; 33(4): 1-52347-565Xhttp://imsear.searo.who.int/handle/123456789/188083Republic of Uzbekistan the composition of the atmospheric air on the main streets, the level of traffic on these streets, the selection of resistant species of phenol trees for growing ornamental trees, and the laws of changing the amount of pigments in these trees depending on the streets and season. At the same time, the types of ornamental trees and their resistance to pollution from the pollution of carbon dioxide, nitrogen oxides and sulfur dioxide are mainly represented by atmospheric air pollution.Treesleavesassortmentleaf pigmentschlorophyllJournal ArticleIndiaAndijan Institute of Machine Technology, Uzbekistan.Andijan Institute of Machine Technology, Uzbekistan.Andijan Institute of Machine Technology, Uzbekistan.Andijan Institute of Machine Technology, Uzbekistan.