A host of inspiring authors, activists and vendors are set to be on hand at the 13th annual DC Green Festival Expo to celebrate and promote sustainability and healthy, eco-friendly living. Along with more than 50 speakers, the weekend-long festival at the Washington Convention Center features hands-on workshops, kids' activities, cooking demos, live music and entertainment and a huge marketplace filled with upwards of 200 exhibitors. You'll be amazed at the range of products and services available, from food, fashion and health to energy, home, garden and design. You can celebrate Mom's Day and head home with tons of ideas for living a greener life.