Cast aside

As we drive off the main road onto a dirt track at Mancha, the rusty sign comes into view.

My guide in Ethiopia, Gebre Birega, shouts it out before my eyes have time to piece together the faded lettering: ‘‘Sun Biofuels, see, there it is!’

We meander our way through the 3,000 hectares of spindly brown jatropha bushes, some still bearing fruit, but all abandoned.

The British-based biofuel company is long gone.

On ...