UN sees slight progress on climate action, partly offset by the US

Countries have made very slight headway in the fight against global warming over the past year by tightening their policies to limit emissions of carbon dioxide and other greenhouse gases, according to a United Nations report released on Tuesday.

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But there’s a catch: some of that progress could end up being canceled in the years ahead as the United States dismantles its pollution controls and other climate policies under President Donald Trump, the report said.

The UN’s annual Emissions Gap Report measures the disparity between what world leaders have promised to do to limit the rise in global temperatures and what they are actually doing to rein in carbon dioxide and other planet-warming gases from fossil fuels and deforestation. It typically finds that this gap is very large.