Human: I've heard that septic systems aren't very environmentally friendly. Is this true? Assistant: 
It depends on the type of system you have and how it is managed. A properly designed and maintained septic tank can be an efficient way to treat wastewater, but poorly maintained or improperly designed systems may not perform as well. Septic systems are generally considered more environmentally friendly than other types of wastewater treatment because they don’t produce any harmful chemicals and help keep water clean for use by aquatic life.