Scope 3 emissions emanate from sources that are not owned or controlled by a business directly; rather, they result from indirect sources such as the supply chain, transport to operational sites or to customers, product use, and end-of-life treatment. And a seldom noted fact is that 5.5 times more emissions come from these sources than Scope 1 and 2, so any organization that's serious about decarbonization should report and reduce Scope 3 emissions. Here's your ultimate guide to doing it right.