What can I do for the planet?
Here is your answer: a poetically and practically perfect activity that will create joy, alleviate alienation, connect you to nature. Yes, we can actually save fuel, reduce marine pollution, save millions of gallons of water and create rich fertile soil rather than parched earth.
Sawdust toilets don't smell. The human excrement is normally mixed with sawdust, coconut coir or peat moss to support aerobic processing, absorb liquids, and to reduce the odor. The decomposition process is generally faster than the anaerobic decomposition used in wet sewage treatment systems such as septic tanks.
Billions of humans suck nutrients and don't give anything back. You can make your contribution.
Stop wasting live water.
It's fun. Joyful. Sensible.