Documentary filmmaker Michael Moore made an appearance at Zuccotti Park, milling around with protesters.
Former US president said that Occupy organisers managed to focus national discussion on wealth disparity.
A website dedicated to "Occupy COP17" echoed the frustration of many poorer nations already facing climate impacts.
Oakland became a rallying point for demonstrators when an Iraq War veteran was injured during the clash.
Day in Pics: 1st September
Showbiz World - September 1, 2014
Famous Ganesh Pandals in Mumbai