Describe a way microorganisms are to people, and a way they are harmful.

Microorganism are both helpful and not,
-such as they help clean water,
-useful when it comes to food and alcohol,
 -fix atmospheric nitrogen,
-and Microorganisms are essential tools in biotechnology, biochemistry, genetics -and molecular biology.
But aside from helping they can be dangerous because, 
-not all but some cause disease and sickness.
- contribute to decomposition and spoilage of food, and they can leave toxic waste products behind even if they are eradicated from the contaminated material.
I hope this helps you!!