Dr Christopher Green, director of GFrac Technologies has told ITV News that tremors caused by fracking can be detected before the process of fracking commences, and could be 'preventable'.
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The outage struck Hartfield-Jackson Atlanta International Airport at around 1pm local time, stopping all outgoing flights.
It will be a chilly day for many parts with the highest temperatures, about 10 Celsius (50F) in the far northwest.
The social site has been overhauling many of its policies in recent weeks following repeated criticism over how it handles abusive content.