is for Interactive.
Are you considering Interactive effects? This world of ours is full of interlocking systems, and it's worth pondering just how different elements of those systems affect each other. Interactions can be neutral, negative (a species that can handle a particular level of pollution under current conditions may not be able to survive that same level of pollution under different climatic conditions, and moving a species at risk of extinction in its historic range to a new, more climatically suitable location may push some of its new neighbors to extinction), or positive (a species that's stressed by warmer conditions may still do well if its competitors or predators are even more stressed than it is, and getting rid of particular non-native species may decrease the vulnerability of a system to climate changes). We can't anticipate everything, but if we at least ask ourselves about possible interactions we may be able to make wiser choices.