China, U.S. Trade Climate Barbs as Ties Fray

SINGAPORE—Climate policy is fast becoming a new bone of contention between Washington and Beijing, after China retaliated for this month’s visit to Taiwan by House Speaker Nancy Pelosi by halting talks with the U.S. over how to combat global warming.

The self-ruled island is already a focal point for a number of issues clouding Sino-U.S. ties, from rivalry in the Indo-Pacific and the clash between democratic values and autocracy to the strategic struggle for semiconductor supremacy. But up until Mrs. Pelosi (Calif. D.) defied Beijing’s warnings and made her whistle-stop trip, climate change had been a rare bright spot in the increasingly testy relationship between the world’s two biggest greenhouse-gas emitters.

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