Engineers at the University of Sheffield made the discovery . The researchers found that a protein called PKA is responsible for making cells grow in response to an electrical stimulus. This enables experts to work out where pollution is coming from . Innovation could stop sewage being accidently shunted into rivers .
Engineers at the University of Sheffield made the discovery . Tampons glow under UV light when they have absorbed detergent . This enables experts to work out where pollution is coming from . Innovation could stop sewage being accidently shunted into rivers .