Increased usefulness brought about black gold's golden age. (canadianbusiness.com)
It is hard to see countries leaving black gold worth billions in the ground — and if they did all agree to do this, it could trigger another global financial crisis. (newscientist.com)
He is the author of Black Gold of the Sun: searching for home in England and Africa, nominated for the Orwell prize, and the editor of Africa Modern: creating the contemporary art of a continent. (ekoweshun.com)