It is not because the idea is "copied" that we cant work around it and do something better.
I wasn't saying that is was copied, simply that if an example in game was needed, it is there 
New tools to get distilled water
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Rain is not that acid.
And H2CO3 is not an ion or is it? It is the combination of H2O and CO2, so when the water evaporates, there is no ion left. -
H2CO3 is a gas that is ionized into water and makes weak acid ions (H+ and HCO3-) and when exposed to the atmoshpere it decays back into H2O and CO2.
Anyways, truly distilled water only comes from distillation (which requires boiling water).
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I agree with that.
However, you wouldn't get much ions like this one since CO2 concentration in Minecraft's atmosphere is really low (pre industrial era, with as much plants as we want). -
There were always CO2 in the atmosphere regardless of human race. That is what keeps the earth warm, with a constant temperature.
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and its sulfur not CO2 that causes the most damage anyway.
sulfur comes from both industrial and natural sources. -
Yes, but if humans declared that water was not acid, it is mostly because CO2 doesn't dissolve very well in water, if I'm not mistaken.
I agree with the fact that sulfur (which comes mostly from the combustion of coal) has a greater impact. It is also true that it can be produced by volcanic eruptions though.