Global programmes to clear the world of landmines face a budget shortfall of almost half a billion dollars next year.<br /><br />The deficit jeopardises efforts to reduce the number of people wounded or killed by the small bombs.<br /><br />But now scientists have come up with a new technique to detect mines without any human presence nearby. <br /><br />It involves genetically modified bacteria, and reseachers say it means mines could one day be located without risking lives, but critics aren't convinced.<br /><br />Tarek Bazley reports.