Walmart

While the world's largest company by revenue has been focusing on using data to make its truck fleet more efficient, it's also been testing out electric cargo-handling yard trucks. So what's next?

Under the program, Walmart will offer its suppliers favorable financing rates in return for progress on cutting emissions.

The former Walmart clean fleet leader recently joined startup Nikola, which makes fuel cell-powered electric semi trucks. We chatted with Fretheim about why she made the move and what she's learned about clean transportation.

Four best practices gleaned from the retail giant's sustainability progress.

Plus, watch for tougher sourcing guidelines for partners on apparel and textiles.

It's been 10 years since the behemoth from Bentonville launched is sustainability quest. So, how's it doing?