Harvard study: 74% of S&P 500 companies revised emissions data

A large majority of S&P 500 companies revise their annual greenhouse gas emissions disclosures, raising serious questions about the quality of climate-related data and the efficacy of America’s voluntary reporting system. More than 135 million tons of emissions went unreported, more than the annual total for many countries. While there is no federal regulation in sight, states and foreign countries are pressing forward with their own rules, which threaten to create a patchwork regulatory environment for many of the world’s largest companies. Meanwhile, the market demand for emissions data is unlikely to subside.