Brown clouds cast a dark shadow.
Dennis
Carina
C
D000397:Air Pollution / Q000009:adverse effects* / Q000032:analysis; D002244:Carbon / Q000009:adverse effects / Q000032:analysis; D002681:China; D002980:Climate; D003031:Coal / Q000009:adverse effects; D004190:Disasters / Q000706:statistics & numerical data; D008962:Models, Theoretical; D011891:Rain; D012905:Smog / Q000009:adverse effects / Q000032:analysis
D003031:Coal; D012905:Smog; D002244:Carbon