Faced with new regulations and public scrutiny, investors are acting with a renewed sense of urgency to address emissions at scale 3 companies in their portfolios. And while some researchers say there are too many data issues when calculating emissions from sources like supply chains or customer product use—which a company doesn’t control but make up about 80% of its carbon footprint—other experts say it’s not complicated, noting that thousands of companies already voluntarily report Scope 3 emissions. (Rev. Kirsten Snow Spalding, more at theenergymix.com)