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In recent weeks, several of the largest and most profitable American companies have introduced elaborate plans to combat climate change. So why are they doing it now? And just how meaningful are their plans? Guest: Andrew Ross Sorkin, a financial columnist for The New York Times. For more information on today\u2019s episode, visit nytimes.com/thedaily.\xa0\n\nBackground reading:\xa0Laurence D. Fink, the founder of the world\u2019s largest asset management company, sparked the shift toward climate-focused corporate policies in his annual letter to C.E.O.\u2019s. Here\u2019s what the letter said, and why it matters.Protecting the environment and tackling climate change have climbed the list of Americans\u2019 political priorities this year as economic concerns have faded. But the issue is as partisan as ever.