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Mr. George Rodgers
asked the Secretary of State for the Home Department if he will publish figures showing the number of successful prosecutions for offences relating to the emission of obnoxious fumes by road vehicles during the last five years for which records are available.
Dr. Summerskill
The number of findings of guilt in England and Wales for offences relating to emission of smoke by road vehicles is as follows:
| Year | Number of findings of guilt |
| 1970 | 1,774 |
| 1971 | 1,757 |
| 1972 | 2,438 |
| 1973 | 2,259 |
| 1974 | 1,900 |