ICSE Class 10 Biology
Question 1 of 10
Pollution — A Rising Environmental Problem — Question 2
Back to all questions(a) Difference between sewage and effluents —
| Sewage | Effluents |
|---|---|
| Sewage is the liquid waste from domestic activities. | Effluents are the liquid wastes produced by factories. |
(b) Difference between biodegradable and non-biodegradable waste —
| Biodegradable waste | Non-biodegradable waste |
|---|---|
| Biodegradable wastes are substances which can be broken down by microorganisms into harmless and non-toxic substances. | Non-biodegradable wastes are substances which cannot be broken down by microorganisms. |
| Examples: Leaves, dung. | Examples: Plastic, glass. |
(c) Difference between smoke and smog —
| Smoke | Smog |
|---|---|
| Smoke contains a lot of particulate pollutants which pollute the air. | Smoke mixed with dust particles and small drops of fog is called smog. |