Some 4667 km separate the capitals of Scotland and Iran. To reach Kabul, you have to go a further 1126 km. But events in faraway places can have unexpected consequences. In the wake of the 1979 Iranian Revolution and the Soviet invasion of Afghanistan, cheap heroin flooded into Europe. In the mid-1970s, there were fewer than 100 injecting drug users in Edinburgh; by the early 1980s, there were more than 5000.

中文翻译：

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1980年代爱丁堡的毒品危机和艾滋病

苏格兰和伊朗的首都相距约4667公里。要到达喀布尔，您必须再走1126公里。但是，在遥远的地方发生的事件可能会带来意想不到的后果。1979年伊朗革命和苏联入侵阿富汗后，廉价海洛因大量涌入欧洲。在1970年代中期，爱丁堡的注射吸毒者不到100人。到1980年代初，已经超过5000。