keywords: beijing moon china breathe floyd
text: As fuel use rises, China eyes alternatives BEIJING -- When the opening lyrics of ''Dark Side of the Moon quot; floated through the air at a Beijing bar on a recent evening, patrons sang along to the Pink Floyd classic. ''Breathe, breathe in the air, quot; they chanted in chorus. They seemed oblivious to the irony, in a city that is fast becoming one of the world's most polluted.