Now that you bring up gas cans, I bought a new small one and I really don't like it over an old one I have. Instead of countering gas leaks it seems to encourage them, I can't keep it in the garage like the older one because when it gets warm its cheap plastic expands and eventually the gas leaks out of the nozzle (some 'safety' feature) and then gets into the furnace which happily pumps gas smells with the AC into the rest of the house... The can's not even half full either.
I vaguely remember the phosphates drama now. But I agree, I don't have any issues sanitizing things...
There are (in my opinion) only two good gas cans out there:
1. The standard US/NATO steel gerry cans with the welded seams (not the crimped seams that you see on the new versions today; you have to do some searching for these nice older cans that were built properly); nozzles can be found at army surplus stores and online.
2. RotoPax - seriously, if you want a modern solution made from plastic, and price isn't an object, RotoPax is what you want.
I'd have to read up more, but as I understand it, that style of gas pump (as well as "new gas cans" which also get a lot of complaints) were made to counter gas vapor leaks that reportedly contributed significantly to smog. Was it trivial in nature? I'd have to see a study.
Separately, the last big thing I knew with clothes cleaning was how phosphates were removed from detergents some years back due to environmental concerns; from my understanding, phosphates in consumer detergent caused far more than "trivial" nutrient pollution (example paper: http://www.jstor.org/stable/25038382?seq=1#page_scan_tab_con...). I noticed when non-phosphate dishwashing detergents were introduced, with our hard water they left lots of spots. But there are non-phosphate ways around that issue. The actual cleaning part is fine.