アースデイ
Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG including 1 billion people in more than 193 countries.

The Paris Climate Accords were signed on April 22, 2016 to coincide with Earth Day.

h4. External links

* "Wikipedia: Earth Day":[https://en.wikipedia.org/wiki/Earth_Day]
earth day