The road slicing through the thickly forested hills of eastern Kentucky used to be called the Daniel Boone Parkway. It was named for the controversial American folk hero who fought his way across Indian country to settle a state where many of his descendants still live.

That was before the coal industry began blowing up the Appalachian Mountains as a cheap way of getting at the black stuff below, behaviour decried by the environmental group Appalachian Voices as “one of the greatest human rights and environmental tragedies in America’s recent history”.

Daniel Boone’s road is now the Hal Rogers Parkway, named after one of the Kentucky coal industry’s closest friends in Washington, a Republican Congressman of 34 years. It passes through a mountain range older than the Himalayas and is blanketed in broadleaf forests rivalled only by the Amazon basin in its biodiversity.