CO2	Per capita carbon emission
APPCAP	Air Pollution Prevention and Control Action Plan
DID	Difference-in-differences
PSM-DID	Propensity-score-matching difference-in-differences
SDID	Spatial difference-in-differences
DN	Digital Number
DMSP/OLS	Defense Meteorological Satellite Program/Operational Linescan System
NPP/VIIRS	National Polar-orbiting Partnership/Visible Infrared Imaging Radiometer Suite
IPCC	Intergovernmental Panel on Climate Change
FD	Fiscal decentralization
IU	Industrial upgrading
UR	Urbanization rate
FDI	Foreign direct investment