When environmentalist Brent Walls saw a milky-white substance in a stream flowing through a rural stretch of central Pennsylvania, he suspected the nearby rock mine was violating the law. Recent rains had filled the ponds at the mine that allow sediment to settle out of the water, but Walls couldn’t easily take a look because…
People who work to protect rivers and waterways have begun using drones to catch polluters in places where wrongdoing is difficult to see or expensive to find
Enviros train drone pilots to find and pursue pollution heraldstandard.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from heraldstandard.com Daily Mail and Mail on Sunday newspapers.