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Reflexões sobre os impactos dos agrotóxicos na saúde dos ecossistemas: os nanoagrotóxicos

Visa em Debate
Introdução: As vantagens associadas ao uso da nanotecnologia têm proporcionado inúmeras aplicações nos mais variados campos do conhecimento. O domínio da habilidade de manipular as propriedades únicas dos nanomateriais, adequando-as aos interesses humanos, foi determinante para isso. Na agricultura, acredita-se que o uso de formulações contendo nanopartículas com atividade agroquímica (nanoagrotóxicos, nanofertilizantes etc.) seja capaz de promover o aumento da produtividade, a redução dos custos e a diminuição dos impactos à saúde dos ecossistemas. Dentre essas vantagens, enfatiza-se uma maior lucratividade proveniente da diminuição das perdas e do aumento da efetividade no combate às pragas. No entanto, a ampla utilização desta tecnologia tem sido limitada pelo desconhecimento de seus impactos à saúde dos ecossistemas decorrentes da variabilidade das formulações, das características físico-químicas das nanopartículas nos seus sítios de ação e da ausência de uma metodologia de avaliação de riscos internacionalmente harmonizada e que contemple as incertezas atualmente existentes. Conclusões: As incertezas ainda existentes necessitam ser resolvidas antes que os governos autorizem o registro e o uso de tais formulações em larga escala para evitar eventuais danos aos ecossistemas.
DOI
10.22239/2317-269X.02576
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