Overview

• Florida governor Ron DeSantis signed a bill allowing roads to be made with mining waste containing uranium and radium.
• The waste, phosphogypsum, emits radon, a radioactive gas and carcinogen linked to 21,000 lung cancer deaths annually in the US.
• Environmental groups argue the bill threatens public health and is a "reckless handout" to industry.
• The bill requires a study on using the waste in roads but experts warn of risks.
• Phosphogypsum will be added to "recyclable materials" that can be used in construction starting July 1.