You’ll want to see “Tomorrow” if you’re fuming over President Trump’s proposed slashing of the Environmental Protection Agency’s budget, his vow to exit the Paris climate accord or the fact that there’s a general perception (not just among politicians) that the effects of climate change are far-off. This French documentary convincingly explains why those views are gravely misguided, but its real triumph is its pervasive feeling of hope.

It’s refreshing to see concrete solutions at work, many of them at the grass-roots level. And the optimism of those countering ineffective politicians and big business is infectious. The filmmakers — the French actress Mélanie Laurent and the civic activist Cyril Dion — interview their subjects during an intercontinental expedition that takes them to Detroit and Todmorden, England, where urban gardening initiatives flourish; San Francisco, which has an enviable recycling and composting program; Normandy, France, where intercropping ensures that “each plant plays a role in the ecosystem”; a village near Chennai, India, whose decentralized democracy reflects the residents’ priorities; Copenhagen, with its renewable energy model and biking culture; and many points in between.