The FA are fully aware of this as periodically over the last few years this has been raised. At the moment there is no evidence to suggest that 3G pitches are linked to cancer and there is continuing testing taking place around the world to monitor this.
The FA released a statement last week – this is a link to view it. Please feel free to share with anyone in the club who is concerned: http://www.thefa.com/news/thefa/2016/feb/statement-3g-pitches-180216
There is also a video about the research that is available to view, this is the link: https://www.youtube.com/watch?v=pVZSVhyMv-A