The $16 million project is scheduled to start later this year, pending approval from the Colorado Department of Public Health and Environment.

A plan mapping out a green future for Scotland’s imperilled Grangemouth oil refinery proposes £3.8bn of investments over a decade, rising to almost £13bn under a best-case scenario.

The site, on the south bank of the Firth of Forth, is home to the UK's oldest oil refinery, which dates back to 1924. It is being closed down by owner Petroineos, with the loss of 400 of the 2,000 ...