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Пишет Richard Stallman's Political Notes (![[info]](http://lj.rossia.org/img/syndicated.gif){kind=small} syn_rms)@ 2022-08-10 19:33:00 |
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Bubble barrier removing plastic particles
A bubble barrier is removing most of the plastic particles from the Oud Rijn river, with a modicum of energy and little human labor.
