According to the United States Geological Survey (USGS), in the annual copper report survey of 2018, it was stated that the total amount of copper world reserves was estimated in 790 million metric tons. It should be noted that the projected global refined copper consumption for 2017 was around 24 million metric tons. An additional data is the slightly increase in copper world reserves for the 2019 year, around 830 million metric tons.
pig feeds only because it supplies amino acids necessary to the animal. But of the total amino acids in the diet, only the digestible amino acids are biologically available to the animal