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Scientists Find Way To Reuse Cigarette Ash As A Water Filter

Among the long, long list of reasons why we shouldn’t smoke lies cigarette ash: it’s a fairly unsavory chemical cocktail that also happens to be a major eyesore around any popular smoking spot. But thanks to a team of chemists, we could use that same cocktail of horrific chemical to make water clean. Go science!

Specifically, a group of scientists led by Jiaxing Li of the Chinese Academy of Sciences found that coating cigarette ash in aluminium oxide makes for a highly effective filter for removing arsenic from water. Specifically, in tests they found that it stripped 96 per cent of arsenic from contaminated groundwater, meaning it meets the standards imposed by the World Health Organization for arsenic filters.

9 hours ago • 125 notes

"You might object that this is a paradox. If awareness is an erroneous impression, isn’t it still an impression? And isn’t an impression a form of awareness? But the argument here is that there is no subjective impression; there is only information in a data-processing device. When we look at a red apple, the brain computes information about color. It also computes information about the self and about a (physically incoherent) property of subjective experience. The brain’s cognitive machinery accesses that interlinked information and derives several conclusions: There is a self, a me; there is a red thing nearby; there is such a thing as subjective experience; and I have an experience of that red thing. Cognition is captive to those internal models. Such a brain would inescapably conclude it has subjective experience."

Are We Really Conscious? - NYTimes.com (via wildcat2030)

1 week ago • 54 notes