Fertiliser has allowed farmers to grow more food to feed a growing population but it worsens climate change and often causes local pollution.

One solution could be beneath our feet, with Britain sitting on an almost limitless supply of a greener alternative.

Tom Heap descends over 1km down the Boulby Mine under the North Sea to see what it’s all about.

#Polyhalite #BoulbyMine #WoodsmithProject #Poly4 #Polysulphate #Fertiliser

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