Smash an old TV, and you risk spewing lead into the air. Crack open an LCD flatscreen, and you can release mercury vapor. Mobile phones and computers can contain dangerous heavy metals such as cadmium and toxic flame retardants. Mexican workplace regulations, like those in the U.S., require e-waste shops to provide such safety equipment as goggles, hard hats, and masks. There’s little of that in Renovación. ... In much of the world, a place like Renovación couldn’t exist, and not only because business owners wouldn’t be allowed to employ people in those conditions. Twenty-five U.S. states and Washington, D.C., home to 210 million Americans, have laws establishing what’s known as extended producer responsibility, or EPR. That means electronics makers must collect, recycle, and dispose of discarded equipment rather than allow it to enter the waste stream. Parts of Europe also have this system. ... Manufacturers don’t do this work themselves. Typically, a state, county, or town establishes an e-waste collection program. Then recycling companies come to haul away the junk. The manufacturers pay some or all of the bill. The e-waste can be of any provenance. ... The lack of a formal, regulated recycling industry is one of many reasons Mexico has become a magnet for spent electronics. ... A ton of mobile phone circuit boards can produce 30 ounces of gold, worth about $39,000 at current prices.