Urea is a crystalline solid, source of N. Urine is the piss, the watery waste stream which contains excesses such as urea. I know, it just sounds weird.
You should see the fuel use in the trucking industry…
https://en.wikipedia.org/wiki/Urea
Urea is a crystalline solid, source of N. Urine is the piss, the watery waste stream which contains excesses such as urea. I know, it just sounds weird.
You should see the fuel use in the trucking industry…
https://en.wikipedia.org/wiki/Urea