Ammonia levels four times higher in Europe’s farming regions, study finds 

Studies have found increased asthma among children in agricultural areas with the most ammonia, including close to intensive pig farms.

A study has revealed the sources of ammonia that are polluting our air and damaging our health and ecosystems.

Researchers collected measurements from 69 locations across mainland Europe and Britain. They found ammonia is, on average, four times greater in farming regions compared with other areas. Agriculture also added to the ammonia found in the suburbs of many cities.