What will it take to stop Senegal’s election protests?

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Senegal’s President Macky Sall is coming under increasing pressure from West African leaders and the international community to reverse a decision to postpone the presidential election. He is accused of putting the country’s democratic path on to “a dead end”. We find out why some asthma inhalers are environmentally unfriendly. And what was reggae icon Bob Marley really like? We hear from the veteran Zimbabwean broadcaster John Matinde, who hung out with him during the country's independence celebrations in 1980.