Challenges During Covid 19 Lockdown
Not surprisingly, COVID-19 lockdowns have reduced carbon dioxides, nitrogen oxides and sulfur dioxides, due to reduction in transportation and fuel combustion gases. Along with these findings, a study in China has shown a significant reduction in airborne ammonia as well, though it is strongly believed that this gas is linked agriculture and essentially a rural phenomenon.
The reduction in ammonia in urban Beijing could be from combustion sources rather than agricultural emissions, said atmospheric scientist Dr. Yuepeng Pan of the Institute of Atmospheric Physics, Chinese Academy of Sciences.
However, some researchers are surprised by the substantial decrease of ammonia amid lockdowns, since agricultural activities remained idle during Spring Festival holidays, which coincided with the lockdown in early 2020 in China.
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