Producing enough food for the world's population in 2050 will be easy. But doing it at an acceptable cost to the planet will depend on research into everything from high-tech seeds to low-tech farming practices.
To feed the world without further damaging the planet, Jeffrey Sachs and 24 food-system experts call for a global data collection and dissemination network to track the myriad impacts of different farming practices.
Although the credit crunch has lowered the price of food, a global recession now raises the hunger pains of the most vulnerable. The stage is set for the next international food crisis, says Joachim von Braun.
In an effort to avoid a food crisis as the population grows, China is putting its weight behind genetically modified strains of the country's staple food crop. Jane Qiu explores the reasons for the unprecedented push.