China is outpacing Canada in determination to tackle climate change and rein in greenhouse gas emissions, says Maurice Strong, a long-time environmentalist and secretary-general of the first global Earth Summit 20 years ago.

Mr. Strong - who lives in both Toronto and Beijing - is in Ottawa this week for a conference on Canada's role in the green economy as countries prepare to convene next month in Rio de Janeiro for a global summit known as Rio+20.

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