When last year's ambitious Routemap to net zero was published by Water UK in collaboration with Mott MacDonald and Ricardo, the sector was frank that it did not have the answers to all the challenges to be faced by 2030. As part of our Countdown to COP coverage, Maria Manidaki, net zero technical lead at Mott MacDonald, talks to Utility Week about the technical hurdles that remain on the water sector’s journey to net zero.