for the second part of his Earth Day quiz. And no matter how you grade on the quiz -- we’re not keeping score -- it’s time to collect your reward with free posters of our favorite life-filled ...

Learn about Earth ... Day celebrations. Explore events, exhibitions, resources, and podcasts that highlight Smithsonian efforts to advance sustainability and discovery in order to help people and ...

World Earth Day is a celebration that takes place every year on the 22nd of April. The first World Earth day began in 1970. On this day, many people raise awareness of environmental issues and ...