Mother Earth is a common expression for the planet earth in a number of countries and regions, which reflects the interdependence that exists among human beings, other living species and the planet. For instance, Bolivians call Mother Earth Pachamama and Nicaraguans refer to her as Tonantzin. In 2009, the United Nations designated April 22 International Mother Earth Day.

Earth Day is a day that is intended to inspire awareness and appreciation for the Earth's natural environment. Earth Day was founded by United States Senator Gaylord Nelson as an environmental teach-in first held on April 22, 1970.

From then the not-so-humble beginnings in 1970, when 20 million participated across the U.S., Earth Day has grown into a global tradition, which is now celebrated every year by more than a billion people in 180 nations around the world but many will do so with Facebook rather than megaphones.