Question

does height of human decrease​

Answer 1

Mostly yes , though it is plateauing . It's mostly down to nutrition and health care access. If you look at the 19th century , Americans were generally taller than Europeans , probably because they had protein rich diets and pure of them lived in dirty, smoky , disease ridden , cities. In early of 21st century the Dutch and Scandawegains top the scale , again probably because they have health diets , get slot of exercise and have universal health Care.

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