When I lived in Boston, which gets far less green props than Boulder (where I live these days), I biked or took the subway every day. Or walked. Subway systems may be flourescent-lit, grimy, subterranean, dirty…but they’re green. And, on occasion, you get to hear some amazing buskers.
Good Magazine Video:
Bonus: the annual NYC No Pants Subway Ride:
Ah, the screech of the T in Boston:
Ah, the occasional brilliant busker: