Kinshasa, 2016, capital of Republic of the Congo, and home to about 12 million people is one of the most populous cities in sub-Saharan Africa. Eduardo Soteras/AFP

There’s a strong chance that one-third of all people will be African by 2100

Will the African population inevitably quadruple by the end of the century? And what are the reasons for this extraordinary growth?
The Coordination of the Azawad Movement at the Algers Peace Accords requested that energy and mineral production be reinvested in northern Mali. EPA

How oil exploration is adding to Mali’s security woes

The ‘war on terror' in Mali is building alongside a growing number of multinationals hoping to extract the oil and gas reserves of the Taoudeni basin, and a strong foreign military presence.
Balinese farmers with Mount Agung in the background. Areas with high volcanic activity also have some of the world’s most fertile farmlands. Reuters/Darren Whiteside

How Mount Agung’s eruption can create the world’s most fertile soil

Volcanic ash can cause a nuisance to farmers, burying agricultural lands and damaging crops. But in the long term, this ash will create highly productive soil that can support huge populations.
Under the El tracks, downtown Chicago. Franck Michel

Urban noise pollution is worst in poor and minority neighborhoods and segregated cities

New research shows that noise pollution in US cities is concentrated in poor and minority communities. Beyond regulating airplane noise, the US has done relatively little to curb noise pollution.
Presidents Issoufou, Yayi, Deby and Buhari at a meeting of the Lake Chad Basin Commission, the body in charge of the lake replenishment project REUTERS/Afolabi Sotunde

The attempt to replenish Lake Chad’s water may fail again. Here’s why

The transnational project conceived 30 years ago to replenish the drying waters of Lake Chad finally seems poised to take off. But first, internal politics within member states must be overcome.
Most of the world’s wild horses, such as the Australian brumby, are outside their historic native range. Andrea Harvey

From feral camels to ‘cocaine hippos’, large animals are rewilding the world

Much of the Earth's megafauna are now found outside their native ranges. Thanks to introduced populations, megafauna richness on each continent is higher today than during the past ~10,000 years.

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