To help meet its goal, Mr. Bezos said, Amazon is ordering 100,000 electric delivery trucks from Rivian, a Michigan company in which Amazon invested $440 million in February.

Mr. Bezos introduced the Climate Pledge alongside Christiana Figueres, who was an architect of the landmark Paris climate agreement while at the United Nations. To limit global warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit) above preindustrial levels, the world’s total emissions of carbon dioxide must be reduced to net zero by around 2050, climate scientists have said. Mr. Trump withdrew the United States from the accord in 2017.

“Whatever Amazon does does not stay within Amazon,” Ms. Figueres said. “It has a much bigger impact.”

But Mr. Bezos punted on many of the workers’ specific demands. Amazon would still continue to sell its cloud services to the oil and gas industry, he said. And while the company is taking a “hard look” at whether its political donations are going to “active climate deniers,” Mr. Bezos stopped short of saying the company would not give them more money in the future.

“We’re going to work hard for energy companies, and in our view we’re going to work very hard to make sure that as they transition that they have the best tools possible,” he said.

Emily Cunningham, a designer at Amazon who helped organize the walkout, praised Amazon for taking action on climate change. But she said the employees would proceed with their walkout plans on Friday and continue to press on these issues.

“Climate leadership is not compatible with actively helping fossil fuel companies extract oil and gas faster,” she said. “Scientists say that to avoid catastrophic warming, we must keep fossil fuels in the ground.”