Statement:
Oman is more polluted than Costa Rica

In the Most Polluted Countries rating Oman holds position #6 2021 out of 112 and Costa Rica is #90 out of 112 2021.
Position of Oman is worse than position of Costa Rica.

Referencies:

  1. Most Polluted Countries 2021 by IQAir
    The countries in the rating sorted by 'Pollution Index' in descending order.
    Costa Rica 'Pollution Index' value is 7.8
    Oman 'Pollution Index' value is 53.9