Who is sponsoring the climate espionage?

Attempts have been made to break into the offices of one of Canada's leading climate scientists, it was revealed yesterday. The victim was Andrew Weaver, a University of Victoria scientist and a key contributor to the work of the Inter-governmental Panel on Climate Change (IPCC).....

In addition, individuals have attempted to impersonate technicians in a bid to access data from his office, said Weaver....

Who has the motive? Who is paying for the espionage?