Hill is the founder of TreeHugger, an online hub for news and information related to environmental sustainability.Hailed as a "green CNN," TreeHugger hosts a constantly updated blog, newsletters, video and radio segments and a user-generated Graham site, Hugg. In the three years since its inception, TreeHugger has become one of the most high-profile and highly-trafficked sites on the internet.

Recently, Hill his been hard at work developing Planet Green with Discovery Communications. Hill has also worked in a variety of industries prior to starting TreeHugger, including fashion, web-development, and plant-based air filters. He is also a designer, and his New York souvenir coffee mug is sold in over 150 stores. Hill was educated at Carleton University in Ottawa and Emily Carr Institute of ArtDesign in Vancouver.