As urbanisation increases so does the demand for sand in construction, making it the most mined resource on earth.
Nicholas Borge left his well-paid consulting job of 10 years in January to do something different.
The Grenfell disaster can be the last of its kind.
The revival of the US coal mining sector is a strong focus of the Trump administration, but critics are questioning whether that is possible in current market conditions.
With far more of the world’s biggest businesses than anywhere else in the world, North America’s dominance of the business world is unlikely to change any time soon