Atomic Energy Organization Of Iran PNG Images (7)
Atomic Energy Organization Of Iran PNG Images (7)
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Arbor Day (or Arbour Day in some countries) is a secular day of observance in which individuals and groups are encouraged to plant trees.
World Health Day is a global health awareness day celebrated every year on 7 April, under the sponsorship of the World Health Organization (WHO), as well as other related organizations.
World Oceans Day is celebrated annually on June 8th to raise awareness about the importance of the oceans and the need to protect them.
World Book and Copyright Day is an annual event celebrated on April 23rd to promote reading, publishing, and the protection of intellectual property through copyright.