"Four experts were sued for defamation ahead of a seminar where they planned to talk about research into the potential health risks on playgrounds and sports fields nationwide." 

"The seminar seemed straightforward enough. Four experts planned to talk about whether artificial grass, which is used on playgrounds and sports fields nationwide, has health risks for children.

But January’s seminar never happened, after the four speakers were sued for defamation by Polyloom, an artificial-turf maker, based on promotional material for the seminar.

“This was before we even said a word,” said Kyla Bennett, an ecologist formerly with the Environmental Protection Agency who is one of the four defendants.

Polyloom and the artificial-turf industry is responding to a growing body of scientific research showing the presence of harmful chemicals in synthetic turf, and potential environmental and health implications. All this is happening as demand for artificial turf, which is made from plastic and mimics the look and feel of natural grass, is booming globally."

Hiroko Tabuchi and Ken Belson report for the New York Times June 17, 2025. [2]