Every year Heavy Duty Trucking puts out a list of 25 top green fleet leaders in the industry. HDT combs through nominations, stories, and press releases to find the top companies. They also look at the companies who are embracing green technologies and sharing their findings with others to make sure everyone is doing their part for the environment. Companies like J.B. Hunt, System Freight Inc., and Walmart made the list. Read the full list below and find out what these companies are doing to lower emissions and help the planet.