There is more to discover once you have completed this interactive puzzle! For Earth Day in 2022, NASA developed a poster including 17 QR codes that link to NASA web pages for in-depth information, videos, activities, and other online resources to help us understand how Earth is changing and why.

The first Earth Day took place on April 22, 1970. Recognized by many as the birth of the U.S. environmental movement, the nationwide demonstration spurred a dramatic rise in public concern about environmental issues. It also secured political action that led to the creation of the Environmental Protection Agency (EPA) by President Richard Nixon later that year and the passage of important environmental protection legislation including the Clean Air, Clean Water, and Endangered Species Acts throughout the 1970s. In the 50+ years since its creation, Earth Day has grown into an event observed by a billion people in nearly 200 countries each year. For many, the global challenge to preserve and protect the environment continues with increasing urgency.