Add Yahoo as a preferred source to see more of our stories on Google. Composting toilets reduce water usage and do not require flushing. Composting toilets are gaining popularity for a good ...

If you've ever been to a state or national park, you've probably used a vault toilet. It's a waterless toilet system for ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

Composting toilets use aerobic decomposition to break down human waste instead of flushing it away in watery sewage. Most don't use water, so they don't need to be connected to a city wastewater ...