by cube » Tue 11 Dec 2007, 19:57:21
$this->bbcode_second_pass_quote('EnergyUnlimited', 'P')heba,
OK you gave us some good ideas about the subject.
However how all that was done in the past?
At the beginning of XIX century there was still about 1 billion peoples on the world and no synthetic fertilizer at all.
How these were fed?
You ever heard of Guano?
It's bird droppings: rich in nitrogen and phosphorus. During the mid 19th century it was being mined on several islands in the Pacific. If it weren't for guano the world population wouldn't have jumped by an extra 70% from 1800 to 1900.
In a funny way Guano was to the 19th century
as
artificial fertilizers was to the 20th century
It was the Victorian version of the "green revolution"
However all things must eventually come to an end. The world was running out of guano and a die-off was around the corner. However humans were "smart enough" to dodge the bullet and invented something even bigger and better then guano --> artificial nitrogen fertilizer thanks to the Haber Bosch process.
Can humans in their capacity for logic and science dodge the bullet again? time will tell...however things aren't looking too good now