An investigation found thousands of white bags near Monterrey, but aerial footage shows a bigger problemRevealed: US hazardous waste is sent to Mexico – where a ‘toxic cocktail’ of pollution emergesCall it the mystery of the white bags. After they were found to be sprawling across acres of land near the Mexican city of Monterrey, authorities ordered their “urgent” removal. Now visual evidence suggests the problem is more extensive than previously known.An investigation by the Guardian and Quinto...