Jalousie window while keeping out water was deemed unsatisfactory by the study's authors. Jalousie windows also have several other drawbacks. Traditional style jalousie windows offer poor overall resistance to water penetration and drafts and are difficult to positively secure, as their slats are easily and silently removed. In addition to the inability to keep out water, they do not provide a secure barrier to keep air conditioned air inside. Also, the metal parts which make up the windows moving mechanism are prone to corrosion in humid environments, leading to damage such as broken or missing cranks. Jalousie windows are objects of scorn
Bay of Gibraltar 2008. From the 24,535 vessels called at the Port of Algeciras Bay, 2,173 took on fuel. Gibraltar in 2009 supplied over of fuel. The local CEPSA refinery produces supplies much of the fuel for bunkering in the bay which it delivers on seven dedicated barge to either Algeciras or Gibraltar. Due to all these facts and the heavy industries along the shoreline, airborne and marine pollution are serious problems in the area. Environmental groups have raised concerns about the risks of oil spills and other types of pollution, particularly in the light of the bay's ecological importance. In May 1998,