Nutritionists determine EARs for thirteen different populations, defined by age and gender, because different population groups have different nutritional requirements: Young boys need more calories than seniors, while women of childbearing age should consume more folic acid
than the rest of the population needs, for example.
I have already made it clear elsewhere that the additional resistor effect
of human CO2 would be insignificant in relation to that from the
rest of the air and the oceans together with the varying solar and oceanic heating and cooling effects but we still
need to know for sure whether it is significant at all over periods
of less
than several hundred years because that may be the time we
need to solve our energy, pollution, resource and
population problems.