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Climate Change in Zimbabwe
Zimbabwe is experiencing more hot days and fewer cold days, and the amount of precipitation it receives is deviating from the mean more frequently.…
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Factors influencing the greenhouse effect
There are three main factors that directly influence the energy balance of the earth: the total energy influx, which depends on the earth's distance…
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Freshwater Resources
Access to water is perhaps one of the greatest challenges for sustainable development in Africa. This resource includes three graphics. The first shows the…
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Water Availability in Africa
Water resources are inextricably linked with climate, so the prospect of global climate change has serious implications for water resources and regional development (Riebsame…
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A Chronology of Change: Natural and Anthropogenic Factors Affecting Lake Chad
Straddling the borders of Nigeria, Chad, Niger and Cameroon in West Africa, Lake Chad has been a source of freshwater for irrigation projects in…
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Changing Biomes in South Africa
Predictions of the effects of climate change on natural ecosystems in South Africa, over the medium to long term, have included reduced spatial extent…
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Aridity Zones
Forty percent of Africa's population lives in arid, semi-arid, and dry subhumid areas. Climate change may lead to an increase in arid zones that…
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The Melting Snows of Kilimanjaro
At the February 2001 meeting of the American Association for the Advancement of Science (AAAS), researchers reported dramatic changes in the volume of ice…
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Food Production Index
Per capita food production is declining in Africa, but it is increasing steadily in the world as a whole. This graphic shows the net…
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The Greenhouse Effect
Human activities are causing greenhouse gas levels in the atmosphere to increase. This graphic explains how solar energy is absorbed by the earth's surface,…
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Malnutrition and Famine
Many countries in sub-Saharan Africa face chronic malnutrition, with frequent famine episodes. This graphic shows the locations of areas in Africa which face chronic…
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Major global bird migration routes to the Arctic
Bird species that migrate to the Arctic coasts and wetlands arrive from nearly every corner of the planet. During the summer, the sun never…