Africa

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Petites maisons colorées sur un bout de terre entourée de mer

Islands and island environments faced with global changes

Openness to the outside world, incorporation within the global economy but also the growth in natural risks and rising sea levels.... With their unique characteristics, often under threat, island environments and communities are today faced with unprecedented destabilising factors.

Health in Transition

It is no longer rare for inhabitants of the Global South to die from cancer or diabetes. In these regions, non-communicable diseases now cause more deaths than infectious ones. This is due to changing diets and new—more urban and industrialised—lifestyle habits. Populations must also cope with the...

The Challenges of the Sub-Saharan Urban Explosion

Sub-Saharan African cities are presently growing at a size and speed unprecedented in human history. This region of the continent, which was always very rural up to now, is becoming predominantly urban. Small, medium-sized and large cities are doubling in size year on year, with some growing by 1...

Leaving poverty behind: microcredit or unconditional gifts?

Sujet
During the International Year of Microcredit in 2005, the World Bank presented microcredit as an effective tool for fighting hunger and extreme poverty. Thirteen years later, what can we say on the subject? Does microcredit help raise people out of poverty? If not, what are the gaps in its...

4 per 1000 initiative

Capturing carbon in the air and storing it in the ground to fight climate change: this is the goal of the ambitious 4 per 1000 strategy. This initiative, the subject of an international research programme, is mobilising several teams at the IRD.
Cowpea roots bear nodules which contain nitrogen-fixing bacteria.

Lipids that boost symbiosis

Certain legumes form a symbiotic relationship with bacteria! Tucked into their roots, these bacteria increase the crop yield of these plants. These bacteria, capable of producing lipid molecules known as hopanoids, therefore seem to provide a distinct advantage.