Excessive nitrogen pollution is subtly rewiring how the world's forests "breathe." Depending on the ecosystem's baseline, it can either drastically speed up or slow down natural soil respiration—the process where soil microbes and roots release carbon dioxide—disrupting long-term carbon storage.

Excessive nitrogen pollution is subtly rewiring how the world's forests "breathe." Depending on the ecosystem's baseline, it can either drastically speed up or slow down natural soil respiration—the process where soil microbes and roots release carbon dioxide—disrupting long-term carbon storage. 

Research highlights two major pollutants driving this shift:

Excess Nitrogen: -

A massive global analysis revealed that while nitrogen pollution acts as a fertilizer, it can disrupt natural soil tipping points. In nitrogen-poor environments, it can increase microbial activity, but in areas with already high nitrogen loads, it suffocates the process, altering how forests cope with climate change. 

Microplastics: -

Airborne fragments are settling on forest floors, burying into the soil, and actively hindering plant photosynthesis which ultimately restricts how much CO2 forests can draw down and process. 

Together, these hidden pollutants threaten the natural respiratory rhythm of forests, turning them from consistent carbon sinks into erratic ones. 

A hidden pollutant is changing how the world's forests breathe .

MJF Lion ER YK Sharma