30.
The answer is: C
Explanation
Answer: C - 5th June
Explanation:
- World Environment Day is observed on 5th June every year.
- It was established by the United Nations in 1972 during the Stockholm Conference on Human Environment.
- First celebrated in 1974.
- Coordinated by UNEP (United Nations Environment Programme).
- Each year has a different theme and host country.
Why other options are wrong:
- 28th February - National Science Day in India (Raman Effect discovery, 1928)
- 4th March - National Security Day in India
- 16th September - World Ozone Day (Montreal Protocol signed on this date in 1987)
Important Environmental Days - must know:
- 2nd February - World Wetlands Day
- 21st March - World Forestry Day
- 22nd March - World Water Day
- 22nd April - Earth Day
- 5th June - World Environment Day
- 5th October - World Habitat Day
- 16th September : World Ozone Day
- 11th December : International Mountain Day
Key facts about Stockholm Conference 1972:
- First major international conference on environment
- Led to creation of UNEP
- Established 5th June as World Environment Day
- India's PM Indira Gandhi was the only head of government to attend besides Sweden's host delegation