U.S. President Joe Biden came into office with more aggressive plans to fight what he called the "existential threat” of climate change than any of his predecessors. Three months into his presidency, he vowed to cut the carbon emissions of the world’s second-largest emitter in half by 2030, a pledge that helped re-establish American climate leadership on the global stage.

One year on, that signature climate goal is all but dead.

Political allies are now acknowledging what scientists who analyze U.S. policy options have confirmed: There’s virtually no viable path to slashing U.S. emissions in line with Biden’s 2030 target — at least not without major legislation that appears increasingly remote. "I am certainly grateful for the improvements we’ve seen under this administration, but it hasn’t gotten nearly far enough to be considered on track to address the climate crisis,” says Rep. Jared Huffman, a California Democrat who is a leading progressive in the House of Representatives.