Leopold was clearly offering an alternative definition of, andorientation for, conservation. Though it sounds simplistic, forLeopold, conservation required the establishment of a state ofharmony between humans and nature, which implied a commitment totwo principles: that we strive to understand how the natural worldfunctions; and that we practice precaution in our use of thenatural world. These two principles are well reflected in thefollowing excerpts from a couple of Leopold’s better knownessays.

Health is the capacity of the land for self-renewal.Conservation is our effort to understand and preserve thiscapacity. - 'The Land Ethic' (1949)

The last word in ignorance is the man (sic) who says of ananimal or plant: \"What good is it?\" If the land mechanism as awhole is good, then every part is good, whether we understand it ornot. If the biota, in the course of aeons, has built something welike but do not understand, then who but a fool would discardseemingly useless parts? To keep every cog and wheel is the firstprecaution of intelligent tinkering. - 'Round River'(1953)

This call to think ecologically was loudly heard again later inthe century with the publication of Rachel Carson’s 1962 book,Silent Spring, which publicized the impacts of agriculturalpesticides on wildlife and human health. While Carson’s book waslargely read as a warning to humanity, consistent with the shallow,human-centred, form of environmentalism that emerged in the late1960s, her real intent was arguably to challenge us to recognizeour existence within ecosystems and the utter foolishness ofnon-ecological thinking.

Activity Thinking Ecologically

you are asked to think about how the use of a highlypersistent and broad spectrum insecticide likedichlorodiphenyltrichloroethane (DDT) shows ignorance of ecologicalthinking? Put another way, why would an ecologist think that itmakes little sense to use DDT? Can you come up with three (3)points?

Please do little research and provide the reference(thank you )