Statement:
Costa Rica is less polluted than Madagascar

In the Most Polluted Countries rating Costa Rica holds position #90 ²⁰²¹ out of 112 and Madagascar is #40 out of 112 ²⁰²¹.
Position of Costa Rica is better than position of Madagascar.

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
   Madagascar	'Pollution Index' value is	21.0