New York City must cut greenhouse gas emissions 80% by 2050 under a bill passed Thursday by the City Council that builds on the city’s long-term sustainability initiative.

The measure, approved 47-0, aims to reduce emissions by using tools similar to those used by the initiative, PlaNYC, such as planting trees and retrofitting city buildings to make them more energy efficient; scientists have linked emissions to climate change.

“There is probably no greater threat to our global civilization than climate change,” Councilman Costa Constantinides, a Queens Democrat and the legislation’s lead sponsor, said at a news conference at City Hall.

Mayor Bill de Blasio plans to sign the legislation and the city will work with private industry to create jobs in the process of reducing emissions even further, said spokeswoman Amy Spitalnick.

Launched in 2007 by then-Mayor Michael Bloomberg, PlaNYC calls for a 30% reduction in greenhouse gas emissions by 2030.