Cancer in the workplace

Good morning all.  I have just received some sad news that a colleague I previously worked with has passed away.  He was 51 years old and 3 years previously had lost a considerable amount of his excess weight which was a fantastic achievement.  My reason for writing today is that I feel no only sadened by his passing but also very angry.  My previous employment was at a printers company, lots of machinery & chemicals, and there has been quite a few cases of cancer, myself included.  Could there be any link to the workplace environment & the number of cancer diagnosises there?  The employees do not have any kind of protective work supplied so are the chemicals the cause or are the employees under so much stress that it is making them ill?  Nobody at the company seems to be at all concerned but I feel somebody needs to be looking at this!  Is anybody aware of who I could contact to investigate this?  I worked there for a considerable amount of time, have many friends there and so naturally am worried them.  Any advise gratefully received.  Kind Regards to you all and stay positive as much as possible.  Love to all.