Example sentences of "[noun sg] have have a major impact " in BNC.

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1 Thermoluminescence has had a major impact on the antiquities market starting from about 1970 when the first tests were made in Oxford .
2 This recognition has had a major impact , not only in the ecological field but also in that of Earth Mysteries .
3 There can be little doubt that the survey since its modern inception has had a major impact on social research , and any history of social research has to award it a salient place .
4 The Franks Report has had a major impact on critical analysis of tribunals .
5 Nevertheless , concern about the loss of agricultural land has had a major impact on development plans , on planning decisions , and on appeal decisions .
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