Tracing the U.S. heroin surge back south of the border as Mexican cannabis output falls

By Nick Miroff, April 6, 2014

TEPACA DE BADIRAGUATO, MEXICO — The surge of cheap heroin spreading in $4 hits across rural America can be traced back to the remote valleys of the northern Sierra Madre.

With the wholesale price of marijuana falling — driven in part by decriminalization in sections of the United States — Mexican drug farmers are turning away from cannabis and filling their fields with opium poppies.

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