Final answer:
Earth Day is observed annually on April 22 since 1970 to promote environmental awareness globally.
Explanation:
Earth Day is observed internationally every year on April 22 since 1970. It was initially established by American college students and activists to promote environmental awareness on a global scale. The day involves various activities such as demonstrations, clean-ups, and community events to highlight the importance of protecting our planet.
Learn more about Earth Day observance internationally here:
https://brainly.com/question/44068903
