Four ideas for a greener future. What if there were takeout containers made of perpetually recyclable materials? What if planes flew around the world on biofuel? The environment would be much cleaner than it is now. Also featured is a woman who aims to create a sustainable community by using local forestry to generate energy, and an appearance by a family in California who save energy using an innovative app. These are hints for a future that we can shape through our own choices.