I first read about irradiation when visiting New Zealand in about 1970. There was a large amount of public information condemning the practice. This matter is a deep concern and should be to consumers of meat. The practice is upon us now.
http://www.americangrassfedbeef.com/irradiated-beef.asp This is an URL which is ringing the alarm bells.
You are not even safe purchasing from the local farmer, since all meat must be slaughtered in commercial establishments, if the meat is not soley for the consumption of the farmer. Home butchered meat cannot be sold to the public. This is Ontario Law.
A little off topic, the dangers of mass production of public food is a disaster in the making. Meat today, vegetable products tomorrow. The public has given up quality for convenience. Nary a garden in sight in Canada.
I suggest some the grass grown in urban homes be planted in food crops. It is amazing just how many vegetables can be grown
in a small patch. At least one can have a few fresh, safe products for some period of the year. It could be start.