An Act relative to making methane accounting truthful helps

This bill amends Massachusetts state law to improve how greenhouse gas emissions are measured and reported. It requires that emissions be calculated using the best available science from the Intergovernmental Panel on Climate Change, specifically accounting for impacts over both 20 and 100-year timeframes. The legislation also mandates that the state department review and update these accounting methods every three years, retroactively adjusting data back to 1990 if necessary. Additionally, the bill directs the department to align state reporting with federal and international programs and to streamline requirements for various emission sources, including electricity and gas.