Remind me again why we stopped using paper bags in the first place? Oh, right... because they made so much trash, which had to be disposed of someplace.
The lesson here is that everything we do, use, buy, etc., has an environmental impact. Paper or plastic? Disposable or reusable (bags, diapers, etc.)? Landfill, water, electricity, fossil fuels, etc. all come into play because of their impact on the environment. I love the "pooper scooper" logic, that requires you to clean up after your dogs for a safer, better environment. Just yesterday I watched a woman and her dog. After the dog did its business, the lady put on a disposable plastic glove, picked up the waste and put in in a plastic bag, then put that inside ANOTHER plastic bag and knotted it. Want to bet that that plastic sac went inside the plastic trash bag at home? Nice that this woman is environmentally aware and cleans up after her pooch. (actually I am SO happy about this law, hate dog poop on my lawn- but this just cracked me up). I have a niece who detests disposable diapers and will get up on her soap box and carry on at great lengths about the evils of Pampers and their effect on the environment. SHE uses cloth diapers. She also does a full load of laundry, in hot water, using soap and bleach, to wash those cloth diapers, and then runs them in the dryer... EVERY SINGLE NIGHT. Dirty diapers sitting around are gross, and they smell, dontcha know?
Nobody is "better" than anybody else because they choose to do one thing or the other. People need to be environmentally AWARE and make the smartest choices for their location. Reduce, reuse, recycle. Think about what you are doing and make an effort to be as smart as you can about what you need to do in the area in which you live. It's not that hard.