The list is to be used to decide which sites of special scientific interest (SSSI) should have money spent on them to prevent over-abstraction by water-companies, which is the process of removing water for domestic or industrial use.

BBC: Campaigners claim beauty spots 'at risk'

"The process also uses less water and energy - we simply use coloured bottles to avoid using dye, " says Alex Lo, the company's managing director.

BBC: Technology

These use an electrical process to transform salt and water into chlorine and caustic soda (a.k.a. lye), which are the building blocks of everything from plastics to soap.

FORBES: Chemical Balance