Deadly Algae Are Everywhere, Thanks to Agriculture

[Hestia]

3. What's crazy too on top of this is there is a shortage of phosphorus - you'd think there

would be some way to capture it on the front end instead of letting it wash downstream. The easiest to recycle is from urine.

In the Middle Ages, there were people would pick urine from people's doorsteps in the mornings for the tanning and wool industries. They needed the urine to break down fats, etc. Saw it on a "Worst Jobs in History" episode.

http://www.foreignpolicy.com/articles/2010/04/20/peak_phosphorus

http://www.forbes.com/sites/timworstall/2013/06/27/there-is-no-phosphorus-shortage-stop-designing-damn-fool-systems-to-recycle-it/

The original article is silly but the comments are worth reading - mining and resources in the future. Interesting.