The fact that all pesticides are by their nature toxic substances means that any contamination of unintended targets with them is potentially hazardous, and so undesirable. Thus the prevention of environmental pollution by pesticides has become a norm of conduct, guiding the behaviour of all actors. Once again, however, it can be seen that there are different levels of adherence to this norm. To some actors, the evidence of environmental damage due to pesticide use is enough to warrant the outright abolition of their use in any capacity, whereas others merely wish to see them used with some consideration for their ecological consequences. The basic premise that environmental pollution from pesticides is a negative consequence of their use and should be limited, does however represent a universal norm by which all are guided to some extent.