How does mold grow?

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If I leave a sealed, half-full of water, steel water bottle sitting out for 7 days, green stuff starts growing. It’s sealed. Where does the mold come from? How does it form? Thanks.

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2 Answers

Anonymous 0 Comments

Mold spores are far too small to see with the naked eye and are nearly everywhere. They’re just waiting for a the right environment to grow in- dark, damp, and not to hot or cold…like your water bottle.

Anonymous 0 Comments

If it is completely sealed, it was already in there when you sealed it. But as mold needs oxygen to grow I would first assume that your bottle is not actually sealed.