[The Hwankyung Ilbo] Although the amount of dust emitted directly from agricultural activities accounts for only 7.7% of the total PM2.5 emissions, it is pointed out that it is urgent to come up with countermeasures as ammonia emissions, the secondary generation substance, accounts for 84% of the total.
According to the Ministry of Environment, the proportion of ammonium nitrate and ammonium sulfate associated with ammonia in the PM2.5 measured in the metropolitan area amounts to 25.9% ~ 35.2%, and if the range is expanded to six major regions across the country, it accounts for 58%of the total.
As farmland decreases, the use of fertilizer and ammonia that is directly emitted from farmland also declined from 35,125 tons in 2001 to 19,901 tons in 2015.
On the other hand, ammonia emissions from livestock excreta increased steadily, from 137,814 tons in 2001 to 211,362 tons in 2015, with the pig farming sector in particular accounting for 45% of excreta ammonia emissions.
Recent studies have shown that ammonia emissions from the metropolitan area have a significant impact on PM2.5 concentration in the metropolitan area.
Compared with advanced countries, Korea's agricultural fine dust measures are very poor. Advanced countries manage the agricultural sector as a source of pollution that directly generates fine dust. Ammonia emissions are decreasing in most OECD member countries, while ammonia emissions in Korea are steadily increasing.
“In order to improve ammonia emission statistics and prepare efficient policies based on them, it is essential to establish sophisticated data on the generation of ammonia in the agricultural sector and the management of livestock excreta, which requires a survey of livestock farms and the preparation of relevant statistics,” said a researcher from the Korea Rural Economic Institute.
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