BI-1920
Causes of global warming
Biology · Secondary 4 · Easy · Causes of global warming
In a lake, fertiliser runoff causes rapid growth of algae. Which event directly causes the population of decomposers to increase?
- A decrease in dissolved oxygen in the water
- An increase in nitrate concentration in the water
- An increase in the death of algae and other producers
- An increase in the number of fish
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