How effective are business efforts to go green?
Clip: 09/02/2018 | 5m 16s | Video has closed captioning.
Walmart says that 28 percent of domestic power at its stores comes from renewable sources. And 85 percent of companies in the S&P 500 are also reporting updates on sustainability in their annual reports for investors -- up from 11 percent in 2011. Paula DiPerna, special advisor to CDP, an organization that tracks environmental disclosures by companies, joins Hari Sreenivasan for more.
Problems Playing Video? | Closed Captioning