Hundreds of Amazon employees briefly walked off the job Wednesday, calling on the company to reconsider its return-to-office mandate and curb its greenhouse gas emissions. Outside Amazon’s Seattle headquarters, standing underneath a banner that urged the company to stop its “short-term thinking,” Pamela Hayter told her colleagues she wasn’t nervous about speaking out anymore. “We’re here today because it’s the right thing to do,” the Seattle-based program manager said. “I’ve not been nervous. I’ve been fired up.” On Wednesday, nearly 2,000 Amazon employees joined the walkout, according to organizers who gathered pledges before action took place. Of those pledges, roughly...