Green party councillors have called on Cambridge City Council to declare a water emergency. They say the move will help to influence decisions on planning, raise awareness and encourage action to tackle the city’s water crisis. They point out that Cambridgeshire residents are facing potential hikes in their water bills of 13 to 14 per cent and that the water companies themselves predict an insufficient supply of water by 2030. With polluted rivers, failing sewage treatment plants, dried up chalk streams and the growing spectre of flooding and drought, the Greens say the council should acknowle…