As a S.E. at a newspaper, part of the non-electronics/non-network part of our job is to deal with chemistry every day (remote imaging system with chemistry for film and plate development). Because of the sheer volume of chemistry we use, we are required to have a silver recovery system in our chemical drainage system. Most people doing a few rolls of film at home are not going to generate the level of harmful chemicals necessary to pose any danger to the environment. As long as you are on a public sewage system, small amounts of the processing effluents will be within most of the discharged material codes of your community (if you are still nervous about it, call up your local water/city works department and ask them). Also, mix developer and stop bath before disposal, you will partially neutralize them. Do not mix stop bath and fixer - with most consumer chems, you'll get a nice cloud of sulfur dioxide gas. Finally: DO NOT POUR THESE CHEMICALS DOWN YOUR DRAIN IF YOU HAVE A SEPTIC SYSTEM. As for which brands, go to the website of the company that makes your film and check the datasheet on each film. Most films react very differently to different brands and dilutions of chemistry (changes contrast, grain, saturation, etc.). -=>Donald