BELEM – Calling America’s absence from key United Nations climate negotiations “doubling down on stupid,” California Gov. Gavin Newsom said Tuesday the United States risks being left behind as an economic power.

Newsom , a Democrat eyeing a 2028 presidential run, is so far the highest profile of several U.S. governors and mayors at U.N. climate talks being hosted in Belem, Brazil. They say they are here to tell the 195 nations who are trying to fight climate change that much of the United States is doing its best despite Trump administration policies overturning environmental regulations and aiding the production of dirty fuels, such as coal, while stymying green energies like wind and solar.

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