sea level changes

Rising carbon dioxide levels from burning fossil fuels have been linked to sea level changes, snowmelt, disease, heat stress, severe weather, and ocean acidification.

Yet because it does not affect respiration directly, carbon dioxide is not considered a classic air pollutant.

Noting that increasing levels of carbon dioxide cause temperature and water vapor content to rise, researchers analyzed how this could harm lung function and irritate the respiratory system.

They found that each one degree Celsius rise in temperature may increase U.S. annual air pollution deaths by about 1000.