TY  - GEN
AU  - United Nations Environment Programme
PY  - 1991
UR  - https://wedocs.unep.org/handle/20.500.11822/30352
LA  - English
KW  - air pollution
KW  - nitrogen oxide
KW  - carbon
KW  - lead
KW  - mercury
KW  - urban environment
TI  - Urban Air Pollution - UNEP/GEMS Environment Library No 4
M3  - Communication or other resource
ER  -