Seven million Americans threatened by human-induced quakes

Around seven million people in the United States live in areas at risk of damaging, human-induced earthquakes that are often linked to fracking, a report out Monday said. Because the US Geological Survey is including the human-triggered earthquakes on its forecast maps for the first time, the odds of damaging shaking in certain parts of the country is much increased for 2016, it said. The seven million people who are at elevated risk live in the central and eastern United States, which has seen