3 ms·
And, in quantity, even the "harmless" silicates aren't. https://en.wikipedia.org/wiki/Silicosis https://en.wikipedia.org/wiki/Silicosis
by ectopod 4y ago
And, in quantity, even the "harmless" silicates aren't.
https://en.wikipedia.org/wiki/Silicosis https://en.wikipedia.org/wiki/Silicosis