E. coli can live for weeks around the roots of produce plants and transfer to the edible portions, but the threat can be minimized if growers don't harvest too soon, a new study shows. E.

Science news, including the latest on the UK's E. coli outbreak and how scientists are sniffing the air for DNA. And how our changing climate is affecting trees. Show more Dr Chris Smith and the ...

This week: how scientists are getting to grips with the UK's E. coli outbreak ... to the root of how our changing climate is affecting trees.