When I arrived at the urban homestead Mary Christina Wood shares with her family in Eugene, Oregon, she had just pulled homemade bread from the oven. I had come to interview her about a bold legal campaign to prevent climate catastrophe. We sat at her kitchen table, near shelves lined with jars of food she had canned, and talked and drank tea made with peppermint from her garden.

An environmental-law professor at the University of Oregon, Wood is the author of the 2013 book Nature’s Trust: Environmental Law for a New Ecological Age, in which she argues that the resources necessary for human survival — including the atmosphere — are part of a trust that the government must safeguard on behalf of current and future generations. Since politicians are failing to do that, she created a road map for citizens to take the government to court and demand a science-based, legally enforceable plan to stabilize the climate.