Work, where those opposing views will naturally occur and be argued with. One again, your linking of the discussion to the writing will enrich the final written product.
In fact, a discursive essay, in any subject, resembles a debate or a trial. The formal debate, or the staged trial (oil companies charged with climate change; homework research for defiance and prosecution) exactly mirrors the balanced structure of a good dis cursive essay, with it’s for-and- against shape, its support evidence, its final conclusion.