World output will cool to 2.9% in 2025 and 2026 from 3.3% last year, the Paris-based OECD said in a report Tuesday, with the U.S. among the worst hit.

Donald Trump’s combative trade policies have tipped the world economy into a downturn, with the US among the hardest hit, the OECD said.

The OECD slashed its annual global growth forecast on Tuesday, warning that US President Donald Trump's tariffs blitz will stifle the world economy -- hitting the United States especially hard.While annual inflation is expected to "moderate" among the Group of 20 economies to 3.