Q. More pollution loads in lake, no self purification because. (Solved)
1. There is no O2 to sustain microbial activity
2. No sunlight available
3. Microbes die
4. Pollutants settles down at the bottom
- a. There is no O2 to sustain microbial activity
1. There is no O2 to sustain microbial activity
2. No sunlight available
3. Microbes die
4. Pollutants settles down at the bottom