Statement:
Iran is less polluted than Nigeria

In the Most Polluted Countries rating Iran holds position #24 2021 out of 112 and Nigeria is #18 out of 112 2021.
Position of Iran is better than position of Nigeria.

Referencies:

  1. Most Polluted Countries 2021 by IQAir
    The countries in the rating sorted by 'Pollution Index' in descending order.
    Iran 'Pollution Index' value is 30.3
    Nigeria 'Pollution Index' value is 34.0