Phosphorus is a crucial nutrient and a vital component of fertiliser, a mainstay of modern farming. But we could be heading for a major shortfall in supplies, argues Hannah Hislop, with some alarming consequences
Imagine a garden pond filled with white and pink
water lilies and purple irises and humming with a chorus of frogs and birds. Now imagine swimming in it. Alice Klein and Hannah Hislop take a dip in the world of natural swimming pools
