These gains have provided cleaner air for millions of people.
These gains have provided the benefit of less dirty air for multiple million people.
These gains have done nothing but made the air more dirty.
The girl is sliding.
They remarked that when there is a crisis the media tends to focus on that for their reporting.
The two boys are playing in the living room.
the children are in the classroom
A lady is preparing food.
A group of people are walking.