Comment Re:vs gasoline cars (Score 1) 388
Separate sewers are much better from an environmental point of view because they don't wastefully put surface water through the sewage treatment system and are much less likely to end up releasing raw sewage during storms but are rather hard to retrofit.
Except that a separate system means you have twice as many underground pipes to build and maintain.
Except that a separate system means you have twice as many underground pipes to build and maintain.