Statement:
Costa Rica is less polluted than Vietnam

In the Most Polluted Countries rating Costa Rica holds position #90 2021 out of 112 and Vietnam is #34 out of 112 2021.
Position of Costa Rica is better than position of Vietnam.

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
    Vietnam 'Pollution Index' value is 24.7