Arbor Day is a holiday that is celebrated annually on different days in various countries around the world, with the common goal of encouraging the planting and care of trees.
Earth Day is an annual event scheduled for April 22 to show support for environmental protection.
World Wetlands Day is an environment-related celebration that dates back to 1971.
World Day to Combat Desertification and Drought is a global observance held on June 17th each year to raise awareness about the issues of desertification and drought, and to promote efforts to combat them.
