Hannah, an active environmentalist, has her own weekly video blog called "DHLoveLife" on sustainable solutions. She is often the sound recordist, camera person and on-screen host for the blog. Her home runs on solar power and is built with green materials. She drives a car that runs on biodiesel. She has been vegetarian since age 11, and later became vegan. In late 2006, she volunteered to act as a judge for Treehugger.com's "Convenient Truths" contest. On December 4, 2008, Hannah joined Sea Shepherd Conservation Society's crew aboard the , as part of Operation Musashi.