Drains get blocked by ________ and __________.
kitchen waste
chemicals
Final answer: Drains get blocked by kitchen waste and chemicals.
Fill in the blanks:
(a) Cleaning of water is a process of removing _______.
(b) Wastewater released by houses is called ________.
(c) Dried _______ is used as manure.
(d) Drains get blocked by ________ and ________.