2040 review – an optimist's guide to saving the world

Damon Gameau's likable documentary charts the ways we tackle a climate emergency, from solar power to progressive farming

This interesting film by the Australian environmentalist Damon Gameau is an optimistic guide to the workable "regenerative" community projects that can help combat climate change. He imagines the great things that could happen by 2040, when his daughter will be a young woman. Gameau is clearly concerned to move his rhetoric away from anything righteously angry or confrontational - he doesn't, for example, insist on immediate veganism, just a progressive lessening of meat-eating - and gives us an easygoing can-do approach in which there is no great emphasis on sacrifice and not even any obvious sense of emergency.

Related: A vision of 2040: everything we need for a sustainable world already exists