After reading all twelve pages, I'd like to correct a few misconceptions.
First, the B12 found in supplement form is made with fermented bacteria. In nature, microorganisms in the gut convert cobalt to B12 (cobalamin). Most herbivores are ruminants (cattle, goats, deer, sheep, bison, giraffe, etc.) or modified ruminants (the camelids) that have multi-chambered stomachs, one being the rumen where cud is produced and the cobalt to B12 conversion takes place. The B12 then passes into the small intestine where it is absorbed. For other herbivores (elephants, equines, lagomorphs, etc.) this conversion takes place in the caecum or blind gut, which is found at the juncture where the stomach and the small intestine meet. In humans, this conversion takes place in the large intestine and the B12 is excreted. This is why we must get B12 from either animal sources or from supplements.
Second, crops can't be grown everywhere. Most regions can't support any large-scale crop production (New England, for example.) Roughly 25% of all the land on this planet is arable. That's it. And most of this arable land can't be used to grow crops all year long because of climate (i.e., winter). That's why most of the nuts, fruits and vegetables found in North American grocery stores are grown in California, Mexico, Florida and Arizona.
Third, there will be no sustainable agriculture without animals. That is a fact. Not only do animals provide us with food. They also provide us with a renewable source of fertilizer and play a vital role in field rotation. Some animals (chickens, ducks, geese) can also be used to control pests and weeds.
Anyone who's interested in learning how unsustainable, chemical fertilizers are made can go here... http://www.wisegeek.com/what-is-the-haber-bosch-process.htm
And now I must go milk my goats. Peace.
First, the B12 found in supplement form is made with fermented bacteria. In nature, microorganisms in the gut convert cobalt to B12 (cobalamin). Most herbivores are ruminants (cattle, goats, deer, sheep, bison, giraffe, etc.) or modified ruminants (the camelids) that have multi-chambered stomachs, one being the rumen where cud is produced and the cobalt to B12 conversion takes place. The B12 then passes into the small intestine where it is absorbed. For other herbivores (elephants, equines, lagomorphs, etc.) this conversion takes place in the caecum or blind gut, which is found at the juncture where the stomach and the small intestine meet. In humans, this conversion takes place in the large intestine and the B12 is excreted. This is why we must get B12 from either animal sources or from supplements.
Second, crops can't be grown everywhere. Most regions can't support any large-scale crop production (New England, for example.) Roughly 25% of all the land on this planet is arable. That's it. And most of this arable land can't be used to grow crops all year long because of climate (i.e., winter). That's why most of the nuts, fruits and vegetables found in North American grocery stores are grown in California, Mexico, Florida and Arizona.
Third, there will be no sustainable agriculture without animals. That is a fact. Not only do animals provide us with food. They also provide us with a renewable source of fertilizer and play a vital role in field rotation. Some animals (chickens, ducks, geese) can also be used to control pests and weeds.
Anyone who's interested in learning how unsustainable, chemical fertilizers are made can go here... http://www.wisegeek.com/what-is-the-haber-bosch-process.htm
And now I must go milk my goats. Peace.