2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/131996We introduce the concept of the area of a jet, and show how it can be used to perform the subtraction of even a large amount of diffuse noise from hard jets.4 pages, presented at Moriond QCD, La Thuile, Italy, March 2007. To appear in the ProceedingsHigh Energy Physics - Phenomenologytext