Elevated CO2 as a biological pollutant
An Environmental Science: Advances article frames carbon dioxide as a pollutant with risks to human health and biosphere stability, beyond its role as a greenhouse gas.
Why it matters: indoor and outdoor CO2 levels can matter for physiology and ecosystems even when climate targets dominate the conversation.
Use the RSC paper for pathways and evidence. Readers should watch CO2 both as a climate driver and as a direct biological stressor.