We inhale air that is comprised of roughly 78 percent nitrogen and 21 percent oxygen, as well as a trace amount of other gases.
When we exhale, the components are the same, they just come out in different amounts. Exhaled air is made up of about 78 percent nitrogen, 18 percent oxygen, and four percent carbon dioxide, excluding those trace gases.
TL;DR
Inhaled: 78% Nitrogen, 21% Oxygen, 1% Other Gases
Exhaled: 78% Nitrogen, 18% Oxygen 4% Carbon Dioxide
Answer: the root is not a referred to as a layer of the hair
Explanation: Medulla, Cortex, and cuticle are 100% layers but the root doesn’t seem to be one
<span> "The process of ocean acidification is surprisingly simple. Carbon dioxide from the burning of fossil fuels accumulates in the atmosphere where it causes global warming. But it also affects the oceans. As carbon dioxide enters the ocean it reacts with sea water to form carbonic acid!"</span>
B lynxes , moose, and pine trees
