[25] However, under US federal organic standards, if pests and weeds are not controllable
through management practices, nor via organic
pesticides and herbicides, «a substance included on the National List of
synthetic substances allowed for use in organic crop production may be applied to prevent, suppress, or control pests, weeds, or diseases.»
slashing and burning, mining, dousing in
synthetic pesticides, biologically homogenizing (e.g.
through invasive species), altering the chemical composition of the air and water, and
through various other forms of pollution.