When NFL is full of turf: Which NFL team is the most popular?

The sport’s most popular teams are all located in the U.S.A.A.’s football turf is made up of grass, and is covered in many types of dirt, according to the NFL.

The sport was first developed in the 1960s by the National Football League and the NFL Players Association.

Now, more than 1.5 billion fans watch the NFL each season.