Also in Sustainability 2012
The city aims to plant 1 million new trees by 2017.
The city installed 289 miles of bike lanes from 2007 to 2011.
Only a small fraction of the city's roofs have been treated.
Bicycling boosters have long argued that as biking increased in the city, the risk to each biker would fall.
Many of the state's green jobs are based in New York City.
By one measure, the growth of green jobs in New York has substantially outpaced that in the other 49 states.
New York has the lowest greenhouse-gas emissions per capita of any large American city.
LEED certification is a green stamp of approval.
Manhattan tops the list in the percentage of adults who say they buy locally grown food.
There has been a 36% decline in per capita water use since 1991.