
@article {195,
	title = {The complex chemical effects of COVID-19 shutdowns on air quality},
	journal = {Nature Chemistry},
	volume = {12},
	year = {2020},
	pages = {777-779},
	author = {JH Kroll and CL Heald and CD Cappa and DK Farmer and JL Fry and JG Murphy and AL Steiner}
}
