David Steinman interviews John Vlahakis, blogger for The Earthy Report; Mark Hertsgaard, author of “Hot: Living Through the Next 50 Years on Earth”; and Christina Pirello, Emmy-Award winning host of “Christina Cooks” on PBS. For more information, visit www.earthyreport.com, www.markhertsgaard.com, www.christinacooks.com, www.healthylivingmag.com, and www.greenpatriotradio.com.