Approximately 3x3x3 cm of sapwood can filter water at the rate of several litres per day.
An MIT team has discovered that this low-tech filtration system can produce up to four litres of drinking water a day.
I've not tried this yet but apparently if you break off a branch from a pine tree, peel away the bark, and slowly pour water through the stick. The improvised filter should trap any bacteria, producing fresh, uncontaminated water.
The researchers have published a paper summarised in this article.
I'm not sure if this is a new idea but its the first time I've heard about it. Has anyone tried this?
An MIT team has discovered that this low-tech filtration system can produce up to four litres of drinking water a day.
I've not tried this yet but apparently if you break off a branch from a pine tree, peel away the bark, and slowly pour water through the stick. The improvised filter should trap any bacteria, producing fresh, uncontaminated water.
The researchers have published a paper summarised in this article.
I'm not sure if this is a new idea but its the first time I've heard about it. Has anyone tried this?
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