प्राकृतिक जैविक प्रक्रियाओं के तहत कार्बनिक घरेलू कचरे के टूटने और अपघटन को किस रूप में जाना जाता है?

Water distribution mains are designed for:

In the context of a water distribution system, which of the following is also known as a tree system?

The process of passing water through beds of granular materials is known as _____.