Science-fiction writers have spun countless tales of malevolent, rampaging robots laying waste to helpless cities as panicked citizens flee in horror. Now, life is imitating this pulpy art—at least to some extent—with the emergence of a more benign but immensely versatile type of remote-controlled robot designed specifically for demolition work. Fitted with hydraulic breakers and other attachments, track-based, electrically powered demolition robots can venture into interiors, hazardous environments and confined spaces to dismantle floors, ceilings and wall slabs, keeping workers out of the way of falling concrete and other dangers. Demolition robots, which are free from the emissions issues associated
The 2016 Summer Olympics boating and swimming events have put an international spotlight on what has been a long-running problem in Rio de Janeiro—untreated sewage and trash are clogging up major bays and waterways.