Britain’s highest court has ruled that local councils and planning groups must assess the complete environmental impact of new fossil fuel projects before approving them. The decision will make it harder for the U.K. to proceed with plans for large offshore oil fields, including Rosebank in the North Sea. The ruling requires consideration of emissions from oil refining and burning, and it sets a precedent for similar cases globally. The decision is seen as a significant step towards addressing climate change and may influence similar legal battles in other countries.