How can domestic waste be used as mannure?

SnCl_(2) can be used as

LPG is one of the common fuel for domestic use . Which is the main constituent of LPG ?

With the increases in use of polymers, the problem of Plastic waste has become a threat to our environment. This problem can be solved to some extent by introducing biodegradable polymers Name the monomers used for the preparation of the above polymer.

How many images can we see at a time by using two mirrors ?