What would a green future look like? Will trains and airplanes be powered by the sun? Will we have homes that have zero impact on the environment? The most pressing challenge facing us today is how to ensure a healthy Earth for ourselves and future generations. This STEM-based set of True Books introduces students to the engineering innovations that can help us reach those goals. Interesting information is presented in a fun, friendly way—and in the simplest terms possible—and will inspire kids to start envisioning and enacting a more sustainable future.