DAVOS SOURCE: The US Is Growing So Much Weed Now, They're Burning Down Their Crops In Mexico

Last night at the World Economic Forum in Davos, Switzerland, a source with knowledge of security issues along the United States-Mexico border shared this interesting tidbit: the supply of marijuana grown in the United States has grown so abundant and cheap that in the regions of northern Mexico, where it used to be grown, farmers have taken to burning their crops.

It's no longer profitable for them to grow weed.

This makes sense. Medical marijuana is legal in 23 states now. Recreational marijuana is legal in three, and decriminalized in many more.

The bad news: this source says Mexican farmers are growing opium poppies instead - the plants that heroin is made out of.

(We'd describe the source of this information more, but the World Economic Forum is held under something called "The Chatham House rules," wherein reporters are able to share information they've heard here, but not allowed to describe its source.)