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EL PAÍS
Colibríes con 80 años de contaminación
Researchers analyzed historical and modern bird feather collections to track heavy metal contamination in southeastern Mexico over nearly 80 years. By examining the chemical composition of the plumes, they found persistent levels of pollutants like mercury, arsenic, and lead, which correspond to historical environmental events, such as the phase-out of leaded gasoline and volcanic eruptions. The study highlights how atmospheric transport spreads these contaminants beyond protected areas, posing risks to hummingbirds and their critical role in pollination and ecosystem health.
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