- 6,444 viewsDuration: 4:34As climate change disrupts fishing along the Tana River, farmers in Tana River County are turning to the land for an alternative source of fish — through earthen ponds. These are man-made ponds dug into the ground and designed to hold water for controlled fish production. Ibrahim Omar has three of them on his farm, where he rears tilapia for food and income, while reducing reliance on fishing in the crocodile-infested river. Denis Otieno tells us more on this week's Smart Farm.