Farm system boundaries: Discussion of system boundaries in Chapter 3 mainly relates to farms of this type. Briefly, boundaries of Type 2 farm systems (and of Types 1, 3 and 4) segregate them distinctly from the external world, but the boundaries between individual farms are relatively weak.
What is Chromium? Chromium is a steel-gray lustrous metal that is important as an additive in the manufacture of steel alloys (chrome steel, chrome-nickel steel, stainless steel) and greatly increases the durability and resistance of these metals; hence its use in metal prosthetic implants.
What is chromium picolinate? Chromium is a mineral found in certain foods. The body needs only trace amounts of chromium, and deficiency of this mineral in humans is rare. Chromium picolinate works together with insulin produced by the pancreas to metabolize carbohydrates.