A study revealed for the first time the presence of microplastics and nanoplastic in the lungs of wild birdshighlighting the scope of air pollution again. The research, conducted at the Chengdu Tianfu international airport in China, analyzed 51 species of birds, finding plastic particles In all the specimens examined.
The researchers identified Over 11,000 plastic particles in the lung fabrics of the birds, with an average of 416 microplastics per gram of tissue. This figure suggests that birds are constantly exposed to these contaminants, which can be inhaled directly from the air or ingested through nutrition.
Birds as pollution indicators
Birds have always been used as environmental health bioindicatorssince their high mobility and their respiratory system make them particularly sensitive to polluting agents. The results of the study showed that the terrestrial species They have levels of superior microplastics compared to aquatic ones. Furthermore, the larger birdstogether with the carnivorous and omnivorous species, they recorded a higher concentration of plastic particles in the lungs.
The analysis of contaminants revealed the presence of 32 different types of polymersincluding polyethylene, polyurethane and PVC. One of the most frequently detected materials was the Butadienea type of rubber widely used in the production of tires. This suggests that the deterioration of land and terrestrial tiresespecially in urban and airport areas, it can be a significant source of plastic pollution in the air.
An increasingly serious environmental problem
This discovery strengthens the concerns related to contamination of the atmosphere from microplastics. Previous studies had already highlighted their presence in urban and remote environments, such as the Alps or large cities such as London and Paris, but this is the first time that their accumulation is confirmed in the lungs of wild birds.
The impact of microplastics on the health of animals and man is still the subject of study, but their presence in respiratory tissues suggests potential risks for the pulmonary system. Scientists underline the urgency of deepening research and adopting concrete measures to reduce the spread of plastics in the environment. This study not only highlights the worrying state of ecosystems, but also raises questions about the possible effects that these contaminants could have on human health.
