Why is it dangerous to swim in the lake when this algae bloom is present?

 Harmful algal blooms can produce toxins (poisons) that can make people and animals sick and affect the environment. During warm weather, tiny plant-like organisms—algae and cyanobacteria—are more likely to grow out of control in rivers, lakes, and oceans.

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~Emilie G.

20: 5

explanation:

about 20% of the world's population lives in   southwest asia, but on less than 5% of the world's   land area.

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