How a biosand filter works - Animation Style!

[joeblow]

How a biosand filter works - Animation Style!

Here's an explanation of how a biosand filter for those of us with short attention spans.

Seriously though, these things took a lot of research by many dedicated field workers and scientists. They are deceptively simple which makes them an incredible solution for the world water crisis.

www.globalize-this.org

[youtube:2ysb5vry]http://www.youtube.com/watch?v=YaOOmaGzx0g[/youtube]2ysb5vry]