Methane is one of the most potent greenhouse gasses. It is 25 times more effective at trapping heat in our atmosphere than carbon dioxide. One of the main sources of methane emissions is from decomposing organic waste at landfill sites. Today, Alberta offset protocols for landfill emissions use calculations that are based on studies from outside of the province and they may not be completely accurate. Data from this project will help refine Alberta offset protocols associated with landfill gas. The City of Lethbridge will recover core samples from landfills for testing. Results will verify, and if necessary, correct the models the province uses to measure methane emissions from landfills.