Hidden hydrogen: Does Earth hold vast stores of a renewable, carbon-free fuel?

IN THE SHADE of a mango tree, Mamadou Ngulo Konaré recounted the legendary event of his childhood. In 1987, well diggers had come to his village of Bourakébougou, Mali, to drill for water, but had given up on one dry borehole at a depth of 108 meters. “Meanwhile, wind was coming out of the hole,” Konaré told Denis Brière, a petrophysicist and vice president at Chapman […]