TY  - RPRT
AU  - United Nations Environment Programme
PY  - 2019
SN  - 978-92-807-3743-1
UR  - https://wedocs.unep.org/handle/20.500.11822/27645
LA  - English
KW  - pollution control
KW  - air pollution
KW  - air quality
KW  - China
TI  - A Review of 20 Years' Air Pollution Control in Beijing
M3  - Technical report
ER  -