In 2019, there were around **** million tons of nitrogen oxides emitted by irrigation and drainage machinery in China. Vehicles in general were one of the main sources of air pollution in China.
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Ministry of Ecology and Environment (China). (August 10, 2020). Amount of air pollutants emitted by irrigation and drainage machinery in China 2019, by type (in 1,000 metric tons) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 02, 2026, from /statistics/1068939/china-emission-from-irrigation-and-drainage-machinery-by-pollutant/
Ministry of Ecology and Environment (China). "Amount of air pollutants emitted by irrigation and drainage machinery in China 2019, by type (in 1,000 metric tons)." Chart. August 10, 2020. ÌÇÐÄÆƽâ°æ. Accessed August 02, 2026. /statistics/1068939/china-emission-from-irrigation-and-drainage-machinery-by-pollutant/
Ministry of Ecology and Environment (China). (2020). Amount of air pollutants emitted by irrigation and drainage machinery in China 2019, by type (in 1,000 metric tons). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 02, 2026. /statistics/1068939/china-emission-from-irrigation-and-drainage-machinery-by-pollutant/
Ministry of Ecology and Environment (China). "Amount of Air Pollutants Emitted by Irrigation and Drainage Machinery in China 2019, by Type (in 1,000 Metric Tons)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 10 Aug 2020, /statistics/1068939/china-emission-from-irrigation-and-drainage-machinery-by-pollutant/
Ministry of Ecology and Environment (China), Amount of air pollutants emitted by irrigation and drainage machinery in China 2019, by type (in 1,000 metric tons) ÌÇÐÄÆƽâ°æ, /statistics/1068939/china-emission-from-irrigation-and-drainage-machinery-by-pollutant/ (last visited August 02, 2026)
Amount of air pollutants emitted by irrigation and drainage machinery in China 2019, by type (in 1,000 metric tons) [Graph], Ministry of Ecology and Environment (China), August 10, 2020. [Online]. Available: /statistics/1068939/china-emission-from-irrigation-and-drainage-machinery-by-pollutant/
