We asked that question ourselves, and we tried to find out who was responsible for what. The way we understand it, Environment Canada is the lead, and I will choose my words here. “Responsible” is different from being the “lead” department. Environment Canada is the lead department with respect to policies, developing the policies. NRCan is responsible for delivering on programs related to energy--alternative energy, efficiency, you name it. They have had, so far, the biggest part of the pot in terms of money.
With respect to areas like adaptation, it's still unclear, really. I will say that they are condemned to work with each other. Who has the lead still, it's not totally clear, even though I would tend to say it's, as we speak now, Environment Canada.