81.   Continuing developments in physics can lead to the establishment of newly-defined areas of investigation.

82.   Contract law has been of major importance in underpinning the Market, although other areas of law have also had a bearing.

83.   Cutting down vast areas of the rainforests has created serious ecological problems.

84.   Decolonisation meant that, by and large, independent states were created out of existing areas of colonial administration, within their colonial frontiers.

85.   Delinquency and drug addiction are more common in areas of high unemployment.

86.   Depending on what type of dust it is, it just might short out a vital area of the motherboard.