human
I've been told that a septic system is better for the environment than a city sewer system.
assistant
I’ve heard that too, but it depends on how you look at it. A city sewer system can be more environmentally friendly if it uses renewable energy sources and doesn’t dump raw sewage into rivers or lakes. But a septic tank system still requires dumping of human waste into the ground, which could contaminate groundwater. So it’s really up to you to decide what kind of environmental impact you want to have.