Before I was allowed to invest in Ascel Bio, they required me to read two books on the topic of public health. I had no idea of the appalling (by today's standards) disease and other issues caused by (to put it delicately) improper treatment of sewage.
According to Bill Gates, more than half of the world uses inadequate sewage handling which causes millions of lives. So, I recommend reading his story of flying halfway around the world to look at a toilet.
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