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The Daily Fail version claims so, but that doesn't seem sufficient. Nonetheless, its clearly working. It'd be interesting to insert a probe through the cork and run a real-time analysis of the air composition.

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I don't think we can say it's clearly working... This seems like an extraordinary claim and it's hard to know if there's any truth fudging.

Another puzzling factor is the clarity of the glass. When I've seen bottle gardens, they all develop a thick scum from minerals in condensation, algae, and bacterial plaques.

This is a great GREAT point.

It would be nice to hear an explanation.

Magnetic scrubbing brushes. They're commonly used in aquariums.

There is also, Cellular respiration in night within the plant itself, which release some CO2 in the atmosphere. So may be combined with CO2 released by Bacteria and Cellular respiration in plant, it can survive.

Hmm. So over time the soil mass will decrease into nothing as the plant expands?

Bits of the plant are going to decay back into soil.

Most of the mass of plants comes from the atmosphere, not the soil. 95%+ of a given plant is oxygen, hydrogen, and carbon. The soil provides trace elements and a place from which to absorb water.

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