Rising carbon dioxide in the atmosphere may be leaving a measurable imprint inside the human body. Researchers analyzing more than two decades of U.S. health data found that blood bicarbonate levels have climbed about 7% since 1999, while calcium and phosphorus have declined—changes that closely track increasing atmospheric CO2.
Ya humans need air to be a certain composition or we would have to evolve into another species that can withstand the differences in air composition. Or we would go extinct.
There are no other options.