Landfill gas.

The U.S. government hasn't updated regulations since 2016 to curb landfill methane releases despite advances made in technology to monitor and capture this potent gas, Waste Dive reports.

It's not just oil and gas companies that need to curb methane releases. At home and globally, landfills are the third largest source of methane, which is 80 times more potent than carbon dioxide.