During an educational trip,


During an educational trip, a student of botany saw a beautiful lake in a village. She collected many plants from that area. She noticed that villagers were washing clothes around the lake and at some places waste material from houses was destroying its beauty.

After a few years, she visited the same lake again. She was surprised to find that the lake was covered with algae, the stinking smell was coming out and its water had become unusable. Can you explain the reason for this condition of the lake?


Due to the disposal of domestic waste in the lake can provide nutrients for algae to grow rapidly and also aquatic plants. The decomposition of these with the help of

bacteria can cause foul smell also. This development of plants in the nutrient-rich lake is due to the process called eutrophication.

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