Farmers in India are using the remains of their mustard plant harvests to generate electricity.
In Benin, women traditionally harvest and process many of the country's food products. They can now do that much faster thanks to biofuel from the jatropha plant and self-established cooperatives.
Kenya is home to Africa's first geothermal power plant, setting an example for the entire region.
Ernst Huenges, who leads the German Research Centre for Geosciences (GFZ), says there's huge potential to extract energy from the heat and water resources within the earth in order to meet the world's energy needs.