In the latest political wrangle over energy and climate policy, a group of Republican senators over the weekend added provisions to the U.S. federal budget bill that, as currently written, would end clean energy tax credits at the personal level and at utility scale and increase taxes on foreign-made parts for solar power equipment.

The bill, which passed the US House on May 22 on a 215-214 vote, would have a huge impact on renewable projects across the country, rolling back most of the tax credits provided through the Inflation Reduction Act (IRA), which significantly boosted renewable energy development.