KAGONDU NJAGI AFTER selling another bundle of firewood to his latest customer, Augustinoa Kinyua whistled as he made his way back to the spot where he had been preparing his field for planting. Usually, Kinyua supports his family by growing and selling crops such as maize, beans and bananas on his farm in the central Kenyan village of Nkuthika. But these days, he finds there is more money in firewood, as families hit by the economic impact of the coronavirus pandemic turn away from natural gas toward more affordable, readily available wood for cooking and heating their homes. "My customers…