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Walmart U.S. CEO Greg Foran, the architect of the revival of Walmart Inc.’s U.S. stores, is departing to run an airline in his native New Zealand, leaving a big hole at the world’s biggest retailer on the cusp of the holiday season.

Walmart Inc. is weighing the future of JetBlack, a pet project of its online chief that was the first business to emerge from its internal incubation arm.

Amazon.com contributed more greenhouse gas emissions last year than some big competitors in retail, logistics and technology, but less than rival Walmart Inc. and the world’s biggest energy companies, highlighting the growing scale and diverse businesses of the conglomerate.

In a sign of how much Walmart Inc. is betting on e-commerce, the retailer’s revamped credit-card program with Capital One Financial Corp. offers better rewards for online shopping and checking out with its mobile app.

NEW YORK — Walmart is rolling out a grocery delivery subscription service this fall as it races to gain an advantage in the competitive fresh food business.

Walmart Inc., looking to generate more profit from its online unit, wants to start storing and shipping products for third-party vendors for the first time, just as rival Amazon.com Inc. has done for years.

NEW YORK — Walmart said Aug. 23 that it is working on a resolution with Tesla after the retail giant sued the electric car company’s energy division for installing rooftop solar panels that caught fire.

Recession fears may be mounting in certain parts of the U.S. economy, but Walmart Inc. and Target Corp. are signaling that the all-important American consumer is doing just fine.

NEW YORK — Walmart raised its annual outlook after a strong second quarter for the world’s largest retailer, thanks in part to strong online grocery deliveries.