By comparison, the well drilled by Deepwater Horizon, which famously blew up in the Gulf of Mexico in 2010, began a mile beneath the water’s surface and drilled a few miles into the rock before finding oil. This required a huge amount of energy, and when the well blew, it was far harder to contain, causing large-scale, ongoing damage to the biodiversity of the Gulf and the adjacent shorelines, as well as to numerous local economies.