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SODIS is a simple method for disinfecting water in areas where lots of kids get sick and die from bad water.  Basically, you pour water into plastic bottles, put ’em on your roof for a day or two, and the water is clean.  But Katja Grace points us to a study showing that it’s surprisingly hard to get people to do this:

The technical barrier is that people don’t do it much. About thirty two percent of participants in the study used the system on a given day….The leader of the study, Daniel Mausezahl, suspects a big reason for this is that lining up water bottles on your roof shows your neighbors that you aren’t rich enough to have more expensive methods of disinfecting water.

….Fascinating as signaling explanations are, this seems incredible. Having live descendents is even more evolutionarily handy than impressing associates. What other explanations could there be? Perhaps adults are skeptical about effectiveness?….Parents are known for obsessive interest in their children’s safety. What’s going on?

Skepticism sounds like a reasonable guess.  Or maybe parents know that their kids drink water from lots of different places, so cleaning up their own supply doesn’t seem very effective unless everyone else is doing it too.  Or maybe it just takes a while for cultural norms to change.

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DEMOCRACY DOES NOT EXIST...

without free and fair elections, a vigorous free press, and engaged citizens to reclaim power from those who abuse it.

In this election year unlike any other—against a backdrop of a pandemic, an economic crisis, racial reckoning, and so much daily crazy—Mother Jones' journalism is driven by one simple question: Will America will move closer to, or further from, justice and equity in the years to come?

If you're able to, please join us in this mission with a donation today. Our reporting right now is focused on voting rights and election security, corruption, disinformation, racial and gender equity, and the climate crisis. We can’t do it without the support of readers like you, and we need to give it everything we've got between now and November. Thank you.

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