As world leaders criticise the United States for pulling out of the Paris climate agreement, scientists are trying to work out exactly what a warmer world will mean.
The Kenyan government has deployed troops to a central region to fight illegal grazing.
It has been three months since famine, which has been caused by a long-standing conflict between the government and rebels groups, was declared in some parts of South Sudan.
People living along the coast in the South African city of Durban have long complained about the effects of toxic industrial pollution.
Tens of thousands of children are out of school in Somaliland because of drought.
Many of those still in the classrooms are relying on aid from the World Food Programme.
A three-year drought has left more than half a million people in need of urgent humanitarian aid in Somaliland.
More than 100,000 people have left their homes in search of food.
More than two billion people in the world have no access to proper toilet facilities.
Many lives are lost through diseases as a result
In Nigeria, an entire industry thrives on the demand for imported second-hand electronic goods.
The United Nations has raised alarm over a major outbreak of cholera in southern Somalia.
The number of Kenyans needing emergency food aid has doubled in the past three months to three million, the Red Cross said on Tuesday, as the effect of a devastating drought worsens.
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