A new global survey of attitudes toward climate change suggests Prime Minister Justin Trudeau will have a fine line to walk at an upcoming international conference on the issue in Paris.

The study from the Pew Research Centre found Canada is among the 40 countries where most people agree that global warming is a very serious problem.

But at 51 per cent, that describes only a slim majority of Canadians.

The global median was 54 per cent.

The research also suggest Canadians are among the least worried on the planet that climate change will affect them personally.

The study surveyed more than 45,000 people around the world last May, including about 1,000 in Canada.