Inter Press Service: Scientists warn that large-scale fracking for shale gas planned by Mexicos oil company Pemex will cause a surge in seismic activity in northern Mexico, an area already prone to quakes. Experts link a 2013 swarm of earthquakes in the northern states of Tamaulipas and Nuevo León to hydraulic fracturing or fracking in the Burgos and Eagle Ford shale deposits the latter of which is shared with the U.S. state of Texas. Researcher Ruperto de la Garza found a link between seismic activity and fracking,...