In rereading the foreword for the 4th edition, I noted the statement “There does not appear to be much pending for the immediate future.” I was wrong. There have been significant changes in many areas, such as respiratory protection, and dramatic changes in the Clean Air Act which have made it difficult to use incineration as a means of disposing of hospital, medical, and infectious waste. Perhaps the most significant change howev er has been in means of communication, with the explosive growth of the Internet. This has placed a tremendous amount of information available to anyone with a computer and a modem. Indeed, there is.
