Arrange the following environment-related days in chronological order within a single calendar year (earliest first):

Question

Arrange the following environment-related days in chronological order within a single calendar year (earliest first):

I. World Health Day

II. World Environment Day

III. Earth Day

IV. World Ozone Day

Choose the correct order:

1. A. I-III-II-IV (Correct answer)
2. B. III-I-II-IV
3. C. I-II-III-IV
4. D. III-IV-I-II

Correct Answer

Option A — I-III-II-IV

Detailed Solution & Explanation

The correct answer is I-III-II-IV.

Key Points

• Ordering the four observances within a calendar year:
  • I. World Health Day - 7 April
  • III. Earth Day - 22 April
  • II. World Environment Day - 5 June
  • IV. World Ozone Day - 16 September
• The sequence is therefore I-III-II-IV. The two April dates are the discriminator: World Health Day precedes Earth Day by a fortnight, and options that reverse them fail immediately.

Additional Information

• World Health Day marks the founding of the WHO in 1948. Earth Day began in the United States in 1970 and is credited with catalysing that country's Environmental Protection Agency.
• World Environment Day was designated by the UN General Assembly to commemorate the opening of the Stockholm Conference on 5 June 1972, which is why the two are so often examined together. India hosted it in 2011 and 2018.
• World Ozone Day marks the signing of the Montreal Protocol on 16 September 1987, and is formally the International Day for the Preservation of the Ozone Layer.
• Other dates worth carrying for this paper: World Water Day 22 March, International Day for Biological Diversity 22 May, and World Wildlife Day 3 March.