Cientistas identificam poluente de silicone disseminado na atmosfera global

13 de maio de 2026

Reportado por IA

Pesquisadores encontraram níveis inesperadamente altos de metilsiloxanos, uma classe de compostos de silicone, presentes em amostras de ar de cidades, áreas rurais e florestas ao redor do mundo. O estudo vincula grande parte da poluição às emissões de veículos provenientes de aditivos de óleo de motor. Especialistas alertam que a inalação diária dessas substâncias pelos seres humanos pode exceder a exposição a outros poluentes conhecidos, como os PFAS.

As descobertas vêm de uma equipe da Universidade de Utrecht e da Universidade de Groningen. Eles mediram os compostos em locais nos Países Baixos, Lituânia e Brasil. As concentrações atingiram 98 nanogramas por metro cúbico em São Paulo e caíram para 0,9 nanograma por metro cúbico em uma floresta lituana. Os poluentes representaram de 2 a 4,3 por cento do total de aerossóis orgânicos nas amostras testadas.

Study maps pesticide mixtures in Peru and finds higher cancer risk in high-exposure areas

27 de abril de 2026 Reportado por IA Imagem gerada por IA Verificado

A study published in *Nature Health* reports a statistical link between environmental exposure to mixtures of agricultural pesticides and higher cancer risk in Peru. Using modeled pesticide dispersion from 2014 to 2019 and cancer registry data from 2007 to 2020 covering more than 150,000 cases, researchers found that people living in high-exposure areas faced, on average, about a 150% higher likelihood of cancer, with Indigenous and rural farming communities among those most exposed.

Land sources emit over 20 times more airborne microplastics than oceans

Researchers at the University of Vienna have determined that land releases more than 20 times as many microplastic particles into the atmosphere as the oceans, challenging prior assumptions. Their study, published in Nature, used global measurements to correct overestimated emission models. The findings highlight land as the dominant source, though uncertainties persist.

University of Michigan study finds lab gloves skew microplastics data

30 de março de 2026 Reportado por IA

Researchers at the University of Michigan have discovered that common nitrile and latex lab gloves release particles resembling microplastics, potentially inflating pollution estimates. The study, led by Madeline Clough and Anne McNeil, traced contamination to stearates in the gloves during sample preparation. Switching to cleanroom gloves could reduce false positives significantly.

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Study finds dozens of PFAS in cord blood from babies born in early 2000s

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Nearly half of US children exposed to poor air quality, ALA warns

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Study suggests microplastics may contribute to Alzheimer's and Parkinson's

Researchers propose glow-in-the-polymer approach to track microplastics inside living organisms

A research team has outlined a fluorescence-based strategy designed to make microplastics and nanoplastics visible inside living organisms, potentially enabling real-time tracking of how the particles move, change and break down in biological systems.

Pilot study finds microplastics in most prostate tumor samples, with higher levels than nearby benign tissue

25 de fevereiro de 2026 Reportado por IA Verificado

Researchers at NYU Langone Health reported detecting microplastics in prostate tumor tissue from a small group of men undergoing prostate removal surgery, with average concentrations about 2.5 times higher in tumor samples than in nearby noncancerous tissue. The team says the findings, scheduled for presentation Feb. 26, 2026, at the American Society of Clinical Oncology’s Genitourinary Cancers Symposium, add early evidence that microplastic exposure could be relevant to prostate cancer but do not establish cause and effect.

Is Delhi haze caused by Iran's petrol rain? Expert answers

In recent days, rumours circulating online have suggested that the haze over Delhi could be linked to smoke or chemical fallout from refinery strikes in Iran, even claiming that 'petrol rain' in the region was responsible for the unusual atmospheric conditions. An expert provides answers to these claims.

quinta-feira, 07 de maio de 2026, 16:53h