The easiest way to conclude your paper is to review its major ideas. The following paragraph concludes a paper in which the writer explains why he belongs to a book club. I have not been disappointed. Some conclusions merely restate the thesis, although in different words to avoid monotony. While there is no doubt that expanding an airport can have negative repercussions, there is also no doubt that those repercussions can be all but eliminated with careful, systematic planning.
Some conclusions interpret the significance of the material presented in the body of the paper.
The conclusion of the paper on airport expansion might include this statement of significance. In Washington State alone, four other cities like Bellingham have attempted airport expansion in the last ten years. All four projects have been stalled by lawsuits protesting the same three hazards that my proposed planning system could have eliminated. Other conclusions make predictions based on the material in the body of the paper. Pollution is a major world-wide problem against which many powerful interests are being marshaled.