Simple economics for me. I can mix up 40 gallons a week, or 80 gallons a week. I can buy powder, or minerals mixed with water. I loved organics, but synthetic nutrients are more sterile. I understand the relationships. That's why outdoor is easy. But in Nasa's case, and mine, the plants are in artificial containers, in an artificial environment, with artificial light, in artificial medium. What's so crazy about using artificial nutrients? As crazy as pissing on plants?
Exhaustive detailed description of the composition of human urine can be found in NASA Contractor Report No. NASA CR-1802, D. F. Putnam, July 1971.[SUP][3][/SUP] That report provided detailed chemical analyses for inorganic and organic constituents, methods of analysis, chemical and physical properties and its behavior during concentrative processes such as evaporation, distillation and other physiochemical operations. Urine is an aqueous solution of greater than 95% water, with the remaining constituents, in order of decreasing concentration urea 9.3 g/L, chloride 1.87 g/L, sodium 1.17 g/L, potassium 0.750 g/L, creatinine 0.670 g/L and other dissolved ions, inorganic and organic compounds.
Urine is sterile until it reaches the urethra, where epithelial cells lining the urethra are colonized by facultatively anaerobic Gram negative rods and cocci.[SUP][4][/SUP] Subsequent to elimination from the body, urine can acquire strong odors due to bacterial action,[SUP][citation needed][/SUP] and in particular the release of ammonia from the breakdown of urea.
Some diseases alter the quantity and consistency of urine, such as diabetes introducing sugar. Consuming beets can result in beeturia (pink/red urine containingbetanin) for some 10–14% of the population.
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Nasa's study is sited, so don't bash me for siting wicki.
I would never grow a plant with human urine. =(
The argument that it's destroying the planet---> Ya, so.
Do you really believe our species will outlive this planet?
It's nice to pretend that if you don't eat the chicken, some where some chicken will live happily ever after. I don't think so. I believe that when our practices effect the planet enough, it will wipe us off the surface like a flea. It is in our nature to die. Unless another humanoid evolves from us, we're doomed.
Somewhere in Africa, they're talking shit about 600 watt grow lights. If we didn't use artificial light, we'd be forced to irrigate more of the Cannabis belt. 
There would also be less polution!
If we didn't us MH bulbs, we wouldn't be suppressing our Melatonin levels, Etc.
If I wasn't pumping 5K watts into my flower room, the nucleaor reactor wouldn't run so hard, producing less waste, same with coal generators. Unless your in the mountains running OG, your still sucking the modern ages teet.
Until worldwide cohesion, trying to save the environment, will be, well, trying.
But I get it. Do your part. Don't be part of the problem, I can dig it.
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also a shot of a nice bowl i made this mornin consisting of keif ,purple kush , rockstar, and some killer honey oil 
