Robot fish tackle pollution

A heartening story from today’s Financial Times shows how human ingenuity can help tackle environmental problems:

“Scientists are building a shoal of robot fish to be let loose in the port of Gijon [in Spain] to check on the quality of the water.

“Modelled on carp and costing about £20,000 ($29,000) each to make, the fish are to be lifelike in appearance and swimming behaviour so that they will not alarm their fellow marine inhabitants.

“The robots, the first of their kind, are equipped with tiny chemical sensors capable of detecting pollutants in the water.”