How do herbicides, such as Roundup, potentially harm fish populations despite being intended for plants?

Answer

Toxicity can be caused by the inert ingredients present in the product.

Even herbicides intended only for plants can be toxic to fish; for example, some products like Roundup are acutely toxic to fish due to their inert ingredients.

How do herbicides, such as Roundup, potentially harm fish populations despite being intended for plants?
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