As the Trump administration grows increasingly hostile to renewable energy, we speak with acclaimed environmentalist Bill McKibben about his new book, Here Comes the Sun, in which he lays out a hopeful vision for the future that includes avoiding climate catastrophe, reshaping the economy and saving democracy. He says the key to unlock that future is fully embracing renewable energy over the fierce opposition of the fossil fuel industry and its political enablers. He notes that solar and wind are already the cheapest and fastest-growing power sources in history, with more green energy coming online every year. “It’s not that we’re going to stop global warming. It’s too late for that. It’s that we really have a chance to reboot the way the world and its economy and its geopolitics works right now,” says McKibben.