While ev 3-wheelers have become quite common in India, I am not sure if they have led to any visible improvement in air quality. The earlier 3-wheelers were already CNG based and not as inefficient as petrol/gasoline powered ones. We are a developing country so I believe the growth in private cars is also offsetting any gains from ev 3-wheelers.
To add to this, the particulates in the air are not entirely from this pollution, it is a sum of our terrain, geography, agricultural activities and pollution.
We also have to consider that the art and visual design for this game would have been done with primarily Rasterization and traditional RT in mind. Adding the path tracing may or may not generate the most aesthetic look as it was not optimized for that in the first place.
To add to this, the particulates in the air are not entirely from this pollution, it is a sum of our terrain, geography, agricultural activities and pollution.