Growing food-crops on the shores of Zambia's Lake Kariba, the biggest man-made lake of Africa, is quite a challenge. Despite having water nearby, the farmers are facing drought on their land.

The locally made 'treadle pump', which can be used to pump water by using muscle power, has caused a revolution. Farmers are no longer dependent of the raining season that brings water ones or twice a year. The irrigation is way less heavy and the revenues are going up. The reason for this is the availability of water even in the dry periods. On top of that, the quality of the products is also improving.