Consider the following statements regarding polluted water resources : 1. If the polluted water is discharged directly to the recipient (such as lakes and rivers) without treatment, it usually leads to serious deterioration of the ecological life in the water body. 2. The polluted water is usually treated in a sewage treatment plant before it is led to the recipient. Which of the above statements is/are correct ?
- A1 only
- B2 only
- CBoth 1 and 2Correct
- DNeither 1 nor 2
Solution
Concept
Need for treatment before disposal
Step-by-step solution
1. Untreated discharge reduces dissolved oxygen and harms aquatic life (statement 1). 2. Sewage is normally treated before its release into a stream or lake (statement 2).
Explanation
Both statements are standard facts about wastewater disposal.
Why the other options are wrong
Options with only one statement or neither omit a correct statement.
Shortcut
Treat before disposal.
Correct answer: C) Both 1 and 2