John Marshall ’87 and Jessica Lu ’17 say climate change has a public relations problem. It’s the biggest crisis of our time, but too often the people with solutions don’t communicate them in a way that resonates with the public. The solution, they say, lies in what just happens to be the field where Marshall built his career and expertise: marketing. About seven years ago, he founded the Potential Energy Coalition to be “planet Earth’s marketing firm” and use tools of the trade — think, surveys, data, and more data — to answer this question: How do we make people care about climate change and then act?