How can technology best be used to foster environmental sustainability? Journalist Mark Hertsgaard – the environment correspondent forThe Nationand author of the recent book,Hot: Living Through the Next Fifty Years on Earth– will raise that question and others at what promises to be a provocative dialogue with two environmental thought leaders: Stewart Brand and Winona LaDuke. Brand became one of America’s best-known environmental thinkers when he started publishing the iconicWhole Earth Catalogin 1974. More recently, he’s grabbed attention by arguing that environmentalists should rethink their positions on nuclear power,GMOs, and the geoengineering of the planet, ideas laid out in his book,Whole Earth Discipline. LaDuke, a member of the Anishinaabe nation, is an internationally renowned activist working on issues of sustainable development, renewable energy, food systems, climate change, and environmental justice in Native America. Her new book,Earth Meets Spirit: A Photographic Journey Through the Sacred Landscape, will be released in September.