Statement:
South Africa is less polluted than Vietnam

In the Most Polluted Countries rating South Africa holds position #37 ²⁰²¹ out of 112 and Vietnam is #34 out of 112 ²⁰²¹.
Position of South Africa 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.

   South Africa	'Pollution Index' value is	22.7
   Vietnam	'Pollution Index' value is	24.7