Austin, Texas, nearly doubled its population in 24 years--going from 465,622 residents to 912,791. Some cities, such as Detroit, have decreased in population. The Motor City, which once had 1.8 million residents in the 1950s, went down to a population of 1,027,974 in 1990 and further fell to 680,250 in 2014.
Zinc(Zn) Component of enzymes and insulin; aids in wound healing, growth, tissue repair, and sexual development. Wheat bran, pumkin seeds, sunflower seeds, brewer's yeast, onions, oysters, green leafy vegetables.
Requirement: Manganese is one of the most important trace mineral which helps to improve our metabolism. Human body requires around 2500mg of manganese. This mineral along with vitamin-B also helps to activate various enzymes in our body, especially the one which helps in the formation of urea.