Matt chats with David, one of the most important writers today on energy, climate and the environment, about several of his recent columns in the online news outlet Vox. First, they tackle “radical flank effects,” about whether more radical forms of activism are useful to broader movements. Next, they discuss renewable portfolio standards, a wonky but important policy tool. David then explains why he thinks discussing population growth and birth rates is a poor choice for climate activists. They chat about why it’s important to understand the logic and economics that explain the actions of utilities like Rocky Mountain Power. Lastly, David describes how he stays optimistic in the Age of Trump. For more information, check out David’s lively Twitter feed, his indispensable Vox columns, and his Grist.org articles.