We now go to watch Ealing, and the black clouds of crumb that constantly rise from the pitch really make you wonder how healthy they can be for the players.
Not!
There is no total proof it is carcinogenic, so to the RFU it is OK.
Just like lead in petrol. cigarettes, asbestos, repeatedly being knocked out with head injuries (just chuck a bucket of water on it).
Given the number of such pitches in use in schools, community sports facilities, the cost of replacement will be horrendous, so better to ignore the problem until the lawsuits roll in, and then bleat that 'nobody told us'.
The Dutch banned these pitches years ago.