Google Doodle: Earth Day Observed on April 22 as a Google Search Engine Theme

Google search engine change their logo as an Earthday theme. Google celebrates Earth Day on April 22 every year.
Earth Day is an event that was held all over the world to protect the environmental. First the earth day was name and the opinion by John McConnell in 1969 at a UNESCO meeting. Later it was approved in April 22, 1970 by United State Senator of Gaylord Nelson. After that Earth day was launched by Denis Hayes to spread the event all over the world in 1990 and the event took more than 141 countries.

Google Doodle Earth Day themes:

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