Correct Answer:
B. 5th June
The correct answer is 5th June. World Environment Day, celebrated annually on June 5th, is the United Nations' principal vehicle for encouraging worldwide awareness and action for the protection of our environment.
History and Significance of World Environment Day
- Established in 1972: The day was designated by the UN General Assembly during the Stockholm Conference on the Human Environment — the first world conference to make the environment a major global issue. It was first celebrated in 1974.
- Annual Global Host: Each year, a different country hosts the official celebrations, with a unique theme to focus global efforts. Past themes have included "Beat Plastic Pollution," "Ecosystem Restoration," and "Only One Earth."
- Purpose and Reach: The day is observed by millions of people in over 143 countries, providing a global platform for governments, businesses, and citizens to rally around pressing environmental issues, from climate change to biodiversity loss.
- Distinguishing from Other Dates: 22nd April is Earth Day, 21st July has no major global environmental observance, and 16th September is International Day for the Preservation of the Ozone Layer. World Environment Day is firmly established on June 5th.
Therefore, World Environment Day is celebrated on 5th June each year.