You may have heard that Ken Burns new series called "The National Parks: America's Best Idea" is set to debut on PBS on September 27. PBS' website says that while the show was filmed over six years at some of the most breathtaking locales in the country, it is essential a story about people from all walks of life who are interested in preserving the natural wonders of the world. You can check out a sneak peak of the series here, and hopefully this makes you want to watch the rest because it looks like it will be really good.
Also in the link above, you will find clips and descriptions from three films debuting soon, including No Impact Man, The Age of Stupid, and Crude. These films depict various environmental injustices going on in the world.