A group of 16 New York City hotels have made a collective pledge to cut their greenhouse gas emissions by at least 30 percent in the next decade. Among those on the list are the Dream Downtown, Hudson Hotel, 1 Hotel Brooklyn Bridge, 1 Hotel Central Park, Crowne Plaza Times Square, Grand Hyatt New York, Hotel Pennsylvania, Loews Regency Hotel, Lotte New York Palace, InterContinental New York Times Square and the Roger Smith Hotel.

The effort is part of the NYC Carbon Challenge campaign from Mayor Bill de Blasio to curb the city’s greenhouse gas emissions by 80 percent by 2050. That would help reduce emissions by more than 32,000 metric tons and result in an energy cost savings of around $25 million.

“If some of New York’s most iconic hotels can significantly reduce their carbon footprint, anyone can,” the mayor said in a statement last month.

“As the nation’s number one big city destination, the hotels are showing the rest of the world that our city is committed to reducing our carbon emissions and fighting climate change,” Herve Houdre, general manager, InterContinental New York Barclay, said in a statement.