Without water, there would be no life on earth - no people, no animals, and no plants. It is our most important resource, vital to all growth. But do we have enough water?
The African Development Bank has proposed developing the continent's 400 million hectares of cultivatable savanna lands, but guest writers Sam Dindi and Esther Ngumbi explain the potential environmental impact.
We must wean ourselves off unsustainable economic growth if we are to cut greenhouse gas emissions and avoid catastrophic climate change, say some economists. But what are the alternatives to growth?
Terrorism and climate change are widely considered as the two most significant threats of our time, but what few realize is to what extent the two are connected.
It's scarce, unevenly distributed and causes mass migration - here are some facts about our drinking water.
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