No edit summary |
No edit summary |
||
| Line 61: | Line 61: | ||
-circulation | -circulation | ||
I think that city rivers and citizens share the | I think that city rivers and citizens share the body. People in the city drink the river water. | ||
The sewage produced by human excretion goes through a purification process and returns to the river. | The sewage produced by human excretion goes through a purification process and returns to the river. | ||
River water becomes the water we drink again. | River water becomes the water we drink again. | ||