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For SpaceNut re #50
Thanks for showing us that image!
I was unaware of the changes that are happening in that part of the world.
If someone is looking for a supply of heavy metals, that might be a good place to look. Nature is taking care of the mining.
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Today's Internet feed included a link to reports about research on water treatment.
In the US (and probably around the world), water for public use is treated to kill biological agents.
Chlorine was used at one point (and it may still be in some locations) but health consequences led to efforts to find an alternative.
The alternative has been in use for a number of years, but any possible health consequences were unknown, primarily because a way of testing was (I gather) unknown.
The article at the link below reports on recent developments:
https://www.nbcnews.com/science/science … rcna181052
This report should be of interest to Mars settlers, because water for human consumption will have to be treated. The incoming water will most likely not have carbon based contamination, but over time, and especially in larger communities, the same water treatment methods will be needed as are used on Earth, because pathogens will arrive with humans, animals and plants.
I note the post recently (in November of 2042) by Calliban, calling renewed attention to the challenge of settling Mars.
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