Cloth Nappying is a natural choice, and has been used for thousands of years. 

Hemp and bamboo are organic raw fabrics, that are unbleached, have been grown with little water and no pesticides or chemicals.  They also contain antibacterial and antifungal properties.

It is illegal in Australia to dispose of poo in a bin; this includes poo left in a disposable nappy. 

There are many accessories that can be bought with cloth nappies, such as flushable Eenee liners which simply get placed inside the nappy, catch all solid matter and can be simply flushed down the toilet.

Or if you prefer to invest in a Little Squirt which is basically a hose that can be attached to your toilet tap so you can rinse poo straight into toilet.  Microfleece liners are also good, and poo literally rolls off the liner.