A Flow.

It is a flow
 without any halt
 does not falter
 jumps and rushes
 flows in such a speed
carries with it the flora
 colourful flowers  go through
 green leaves pass through
 brown twigs float through
 along with the dirt and rubbish
 the city generously extends
 unmindful of the contamination
 the way man reciprocates
availing the gifts of nature.