it is the drinking water inspectorate web site
Sustainable agriculture simply means the farm sustains the family without them having to obtain income from outside the farm. The farm supplies the farm family with everything they need plus enough income to buy whatever the farm doesn't supply. Non ...
The Tone river supplies water for more than 30 million inhabitants of Tokyo metropolitan area and it has the largest watershed. For the other, I only know Abe river supplies water to Shizuoka city and Toyohira river supplies water to Sapporo.