Roderick Chen....................................................................

Roderick Chen....................................................................

acp25226....................................................................

aerial detail of the underground metro tracks....................................................................

commuter train....................................................................

downtown....................................................................

ecology....................................................................

ecosystem....................................................................

environment....................................................................

environmentalism....................................................................

land....................................................................

land transportation....................................................................

nature....................................................................

nobody....................................................................

public transportation....................................................................

railroad....................................................................

railway....................................................................

scenery....................................................................

subway car....................................................................

subway train....................................................................

transport....................................................................

transportation....................................................................

urban landscape....................................................................