Ten months before he resigned from Mark Carney's cabinet, Steven Guilbeault vouched for the then Liberal leadership contender.

"I've known Mark for many years. We've worked together on issues of green energy, transition, fighting climate change and the role of the financial sector in fighting climate change," Guilbeault told reporters when he endorsed Carney's candidacy to lead the party in January.

If Carney was known for anything other than being a central banker it was for his advocacy on climate change, going back at least a decade to a celebrated speech he delivered as governor of the Bank of England. He was the UN's special envoy for climate action and finance and co-chair of the Glasgow Financial Alliance for Net Zero (which unravelled just as Carney was preparing to seek

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