Sand mining on beaches and in riverbeds is a source of income for unemployed Africans, but it’s often an unregulated — or under-regulated — business. Environmental impact is a growing concern.
Read MoreBetween 2030 and 2050, climate change is projected to cause about 250,000 additional deaths per year from heat stress, malnutrition and the spread of infectious diseases like malaria, according to the World Health Organization.
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