TEDed has launched an online education program called Earth School which aims to take learners on a daily adventure or quest to understand more about the world we are living in.
From Earth Day (April 22nd) to World Environment Day (June 5th), every weekday explores a different topic about Earth and leading to a cleaner and greener life. Weekly themes are covering areas such as society, nature, and individual or collective actions.
Still available here :
https://ed.ted.com/earth-school