Climate Promises by Businesses Face New Scrutiny

The United Nations conference on climate change in Glasgow has been full of promises by companies to reduce their carbon emissions. How many will live up to them and how will anyone know if they are complying?

A sampling of new commitments includes United Airlines Holdings Inc., which says it will replace 5% of its jet fuel with biofuel alternatives by 2030, and more than 450 banks and other financial firms who say they are shifting their businesses toward clean energy. Dozens of other businesses talked up their climate plans.