In Chile, children in a mountain village are designing their own world by planting trees.
In the Ghanaian capital, Accra, university students learn about sustainability by practicising it.
Do we need genetically modified food to quell global hunger? That controversial question prompts emotional debate. The truth is anything but clear-cut.
Around the world, harvests are adversely affected by extreme weather such as droughts, floods and storms - and those who pay the price are the ones who can least afford it.
More than one billion people in poor countries are affected by dangerous infections, but they don't get proper treatment. DW spoke to John Kufuor, Special Envoy for the Global Network for Neglected Tropical Diseases.