Edmonton Mayor Don Iveson says cities can do a lot to fight climate change on their own.

Iveson was speaking at an international conference on the issue in his city.

He says even if federal or regional governments are indifferent or hostile, municipal policies can influence at least 70 per cent of world's greenhouse gas emissions.

Although United States President Donald Trump withdrew from the Paris climate change accord, Iveson says more than 400 American mayors are still on board.

The conference, run by the United Nations' Intergovernmental Panel on Climate Change, wraps up on Wednesday.

The conference's findings will be part of the panel's special report on cities and climate change.

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