Climate Change March in NYC

Marches make their way across Central Park South during the People’s Climate March on September 21 2014, in New York.   (TIMOTHY A. CLARY / AFP/Getty Images)

People protest for greater action against climate change during the People’s Climate March on September 21, 2014 in New York City.  (Andrew Burton / Getty Images)

(L-R) British anthropologist Jane Goodall, former US Vice President Al Gore and New York City Mayor Bill de Blasio take part in the “People’s Climate March” on September 21, 2014 in New York.   (DON EMMERT / AFP/Getty Images)

People protest for greater action against climate change during the People’s Climate March on September 21, 2014 in New York City.  (Andrew Burton / Getty Images)

People protest for greater action against climate change during the People’s Climate March on September 21, 2014 in New York City.   (Andrew Burton / Getty Images)

Actor Leonardo DiCaprio participates in the People’s Climate March on September 21, 2014 in New York City.   (Andrew Burton / Getty Images)

(L-R) Primatologist Jane Goodall, Former U.S. Vice President and environmental activist Al Gore, New York City Mayor Bill deBlasio and United Nations Secretary General Ban Ki-Moon participates in the People’s Climate March on September 21, 2014 in New York City.   (Andrew Burton / Getty Images)

Actor Mark Ruffalo participates in the People’s Climate March on September 21, 2014 in New York City.   (Andrew Burton / Getty Images)

People protest for greater action against climate change during the People’s Climate March on September 21, 2014 in New York City.   (Andrew Burton / Getty Images)