Researchers have created a filter that can absorb nearly all heavy metals from water. The filter, made up of carbon nanotubes and quartz can be washed with vinegar and reused—making it affordable for communities that lack clean water.
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CTT reader Bart Kilinski pointed out that several of the substances listed in the tattoo ink infographic above are indeed toxic substances—particularly cinnabar and cadmium and chrome oxides. “Surely those aren’t used in tattooing,” Kilinski comments.
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