Bacteria are on us, in us and around us in number we cannot imagine

We have bacteria living in us, around us, and on is in numbers we cannot even understand.

Even if you have good health and are pretty clean, there wil be about one trillion bacteria grazing on our skin. Every square centimeter is home to 100,000 bacteria.
They dine on the flakes of dead skin, oils and minerals that our bodies shed.
There are trillions more in your stomach, nasal passages, eyes, teeth
Even if we make antibiotics and disinfectants make no difference to these numbers.
We would not be able to live without them. They process waste, purify our water, convert food we eat into useful sugars, extract nitrogen from the air.
Industries convert nitrogen out of air by heating source materials to 500 deg C and pressuring them to 300 times normal pressure, and bacteria do this for us with no fuss.
Any handful of soil will contain up to 10 billino bacteria, and maybe a million yeasts, 200,000 molds and 10,000 protozoans