manhattan

The use of vegetation and rock to absorb rainwater on roofs is part of a growing effort to reduce greenhouse gases, rainwater runoff and electricity demand in New York.

Real estate brokers in New York City may eventually describe its buildings as "pre-green" or "post-green". Rising awareness is reshaping the marketplace. Compiled by New York real estate agents, this is a list of the first wave of LEED certified apartment houses in Manhattan along with a simple poll that asks if readers feel property is worth more with green design features.

More people than ever are turning up the heat on having a nationwide Hydrogen Manhattan Project to build the needed infrastructure for fuel cell cars.

Randy Cohen, the man who sorts out readers' ethical dilemmas in his NY Times Magazine feature column The Ethicist , weighs in on the automobile's impact on urban life.