How does air contain germs
Answers
Answer:
Explanation:
Air contains smoke, dust, germs, water vapour.
Air contains green house gases
Pollution and unfiltered air are causes of germs in air
The air is a hostile place for a microbe. Often dry, lacking in nutrients and filled with deadly ultraviolet radiation, the atmosphere would seem to be the last place a microbe would want to find itself. Yet, a new genetic census of some air samples from Austin and San Antonio, Tex., finds that as many as 2,000 different kinds of microbes may be present in the air we breathe on any given day.
In the air samples, the researchers uncovered at least 1,800 different types of microbes, including those such as the diarrhea-causing Arcobacter and ulcer-inducing Heliobacter genera that can be dangerous to human health. Previous efforts to determine microbe counts in the atmosphere had relied on culturing the air to see what grew. "Over 90 percent you can't recover even though it was not only present but viable," Andersen notes. "It's just something about the physiological state it gets in; when it's not in rich media, it has a different physiology."
This puts the diversity of microbes in the air on par with the diversity of microbes in the soil, a fertile environment for such life-forms. In fact, there is a large crossover between the microbes in the air of a city and the microbes in its soil. The ecologists found that airborne microbes were broadly the same in Austin and San Antonio as well, and varied more depending on the weather than any other factor.