The 1,400-foot-tall luxury spire at 432 Park Ave. uses steam for heat and hot water, one of the least efficient sources. Photo via

Many of the New York City’s most luxurious residential buildings are also conspicuous consumers of energy. While sustainability features are ubiquitous in commercial office space, they are largely absent from the city’s luxury condo market, with developers failing to invest in even the most basic green systems.

Roughly 70% of the city’s carbon footprint is from the energy used by buildings, a fact de Blasio’s administration will need to address in order to meet the city’s goal of cutting greenhouse-gas emissions by 80% in the next 30 years.

Source: Crains