Open this photo in gallery:Toronto-based Enwave Energy Corp., which owns and operates the giant deep lake water cooling (DLWC) system, is expanding its 40 kilometres of underground water pipes.Enwave Energy Corp.Toronto is digging deep to expand what experts already consider to be one of the coolest and most environmentally friendly energy projects on Earth – the city’s deep lake water cooling system.Toronto’s Enwave Energy Corp., which owns and operates the giant deep lake water cooling (DLWC) ...