Single Form Single Form Single Form (BH 325) is a monumental bronze sculpture by the British artist Barbara Hepworth. It is her largest work, and one of her most prominent public commissions, displayed since 1964 in a circular water feature that forms a traffic island at the Headquarters of the United Nations in New York City, outside the United Nations Secretariat Building and the Dag Hammarskjöld Library. It is also the largest artwork cast by the Morris Singer foundry. Copies of a smaller version, Single Form (Memorial) (BH 314), are on public display outside the Johns Hopkins University's Paul H. Nitze School
Environmental issues in New York City Trade Center, which recycles rainwater and uses it in toilets and for irrigation, and computer-controlled heating and lighting. The United States Green Building Council estimates 3,000 new green apartments in New York City have been built since 2001. In 2000 the state of New York introduced a green building tax credit, the first one of its kind in the United States, that has allowed some developers of environmentally friendly buildings to write off as much as $6 million on their tax bill. The city's Department of Design and Construction developed a set of guidelines in 1999 that encourage environmentally sound