The Denver International Airport is making efforts to reduce its carbon footprint.
The airport said Wednesday that it signed on to the Airport Carbon Accreditation program, which requires airports to track and ultimately lower their carbon emissions.
Airports Council International-Europe started the accreditation program in 2009, and it now includes more than 100 airports around the world.
Seattle-Tacoma International Airport was the first North American airport to join the program, according to the group's website.
The agreement was reached Sunday at an Airports Council International-North America conference in Atlanta.
"Reducing greenhouse gas emissions makes good business sense," said Scott Morrissey, DIA's director of environmental programs, in a statement. "As we demonstrate DIA's environmental leadership, we will also be reducing long-term operating costs and reducing local air pollution.
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