Field Turf vs. grass
http://fifthdown.blogs.nytimes.com/2010/03/12/study-raises-questions-about-fieldturf/
"the N.F.L.’s Injury and Safety Panel has found that the rate of anterior cruciate ligament injuries is 88 percent higher in games played on FieldTurf than on grass."
"The president of FieldTurf, Eric Daliere, took issue with the N.F.L. study and pointed to a FieldTurf-funded study that showed a lower injury rate among college football players on FieldTurf."
Big surprise that a manufacturer funded study showed a decreased injury rate for their product.