Hybrid grass

This week we're reflecting on the Football World Cup which took place across Canada, Mexico and the United States this past summer.

It was a tournament that demonstrated that NFL stadiums can successfully accommodate elite international football on both natural and hybrid grass systems.

At the same time, the National Football League's Player Association continues to raise concerns about artificial playing surfaces and player safety.

So today we're asking, what have we learned? What does the science tell us? And whether hybrid grass could in fact offer a practical way forward in the National Football League.

To discuss this, I'm joined by two guests.

Firstly, one of the world's leading turf grass scientists, Professor John Sorokin from the University of Tennessee.

We touched upon it earlier.

Hybrid is still relatively new when it comes to American sports, not least because many venues are multipurpose and 12 month a year staging events.