Farmed wetlands in southern Brazil left frogs with more blood-cell damage, and the aquatic species was hit hardest, hinting at a wider hidden cost of agriculture

Wetlands in agricultural lands in southern Brazil might be silently harming frogs’ genes, with aquatic frogs being most affected, according to a recent peer-reviewed study published in Ecotoxicology. The scientists found that frogs living around intensively cultivated wetlands had a much larger number of abnormalities in their blood cells due to DNA damage than frogs living around natural wetlands.

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