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Are you prepared to give up driving and walk, cycle or take public transport? Are you prepared to cut your consumption of meat and dairy?

These are some of the steps recommended in the UN's latest report on climate change. But is any of it realistic?

We hear from former Prime Minister of New Zealand Helen Clark about two other factors shaping climate change policy - polling and public opinion.

(Photo: A boy attempts to cycle through the floodwaters. Credit: Getty Images)