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Option 3 : Earth Hour

The correct answer is Earth Hour.

  • Earth Hour is switching off the moment observed worldwide on the last Saturday of March every year.
  • This environment event is observed by switching off all lights at homes, business establishments, landmarks and so on for an hour.
  • It was first observed in 2007 by the World Wildlife Fund in Sydney.
  • People switch off the lights of their premises for an hour at 8:30 pm (according to their local time) on the last Saturday of March.
  • It is a symbolic action that connects with people and draws their attention to the climate crisis.

  • World Environment Day was established by the United Nations General Assembly in 1972 on the first day of the Stockholm Conference on the Human Environment.
    • World Environment Day is celebrated on the 5th of June of every year.
  • Earth Day Network (EDN), the organization that leads Earth Day worldwide, has chosen the theme of Earth Day-2018, "End Plastic Pollution".
    • Earth Day is an annual event held on 22 April to demonstrate support for environmental protection. 
    • Earth Day is observed on April 22 since 1970. 
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