Example sentences of "and it [verb] be estimate [that] " in BNC.

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1 Most of the material is injected in the form of dykes which do n't reach the surface , and it 's been estimated that the total thickness of dykes intruded in the last ninety million years is over 400 kilometres !
2 Molecule for molecule , they are 10,000 times more potent than carbon dioxide and it has been estimated that if production is not checked they will rival carbon dioxide as the main greenhouse gas in the twenty-first century .
3 A positive correlation has indeed been reported between the number of prescriptions for psychotropic drugs issued by general practitioners in England and Wales and the rate of deliberate self-poisoning , and it has been estimated that a reduction of 1000 psychotropic prescriptions would be associated with 3.8 fewer admissions as a result of deliberate self-poisoning ( Forster and Frost 1985 ) .
4 And it has been estimated that in Tanzania one elephant family in three are orphans .
5 The scheme has certainly helped to attract manufacturing firms , and it has been estimated that between 1957 and 1977 some 5,000 new jobs were created in 113 factories , many of which were engineering or clothing firms ( Broady 1980 ) .
6 In Britain there are 100,000 convictions annually for driving under the influence of drink and it has been estimated that 20 per cent of all hospital admissions are associated with alcohol in some way .
7 Crime has always been with us and Halling was no exception and it has been estimated that Kent 's crime rate in the 13th century was higher than any other county , and a statement by Prof. James Given , of Michigan , says that the percentage of murders at 23 per 100,000 in Kent was higher than the U.S.A. average of today .
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