Is a pesticide that influenced society by increasing crop yield, but it also caused human and animal sickness.

Well there actually plenty of such things. In particular though I think your looking for something like DDT. or DDT is a organochlorine that was used widespread throughout the world as a pest killer, in particular insects. However it is extremely toxic and mutagenic and many problems were noted when the runoff when into the river supply and was uptake by fish, who were then eaten, in particular bald eagles. Eagles started dying and were incapable of laying viable eggs because of the agent leading to a near extinction of the species.

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )