I was just reading about urban agriculture, di you know community waste was used in ancient Egypt to feed animals on the farm?
Wow that's interesting.Don't the animals catch disease?
Quite possibly. It wouldn't surprise me if people fell sick, too, as the food was distributed around villages, towns and cities.
One thing they say is that civilization started from Egypt, so you never know they might have found a way to sterilize the food that is not recorded. 
That's very true. It is argued that ancient Egyptian culture was influenced by afroasiatic speaking populations in North East Africa.
Tell me more about the Afroasiatic speaking population. Would that be like Tanzania of today?
Absolutely! Afroasiatic languages have over 350 million native speakers, making ti the fourth most common of any language family. That's incredible, don't you think?
Yes the numbers are huge!
Though the most common spoken afroasiatic language is Arabic.