How would you describe the positive and negative impact that algae have have on humans?

Answer 1

Algae produces Oxygen for us but takes up a lot of water surface.

Algae are a major source of oxygen for our atmosphere because they produce more oxygen than trees do, but because they grow on the water's surface, they can shade out sunlight for organisms that live beneath them, which can kill off other plants and occasionally even fish. Algae also grows relatively quickly, which can be problematic if it starts to grow out of control.

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Answer 2

Luna Cruz

Negative: Toxin production, harmful algal blooms, problems with water quality; positive: Oxygen production; food source; and possible biofuel.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.