Dyson awards shortlist includes solutions to plastic waste and water pollution

‘Potato Plastic’ and a river-cleaning robot are among 20 contenders for this year’s prestigious global prizeCutlery made from potato peelings and a robotic cleaner that can tackle pollution in rivers, lakes and canals are among the groundbreaking international designs shortlisted for the prestigious annual James Dyson award.Over half the world’s population currently live in cities, according to the United Nations – a proportion expected to rise to seven in 10 people