The world oil prices have continued to rise since the late 1990s and more and more voices have started calling for alternative sources of fuel.
Okuva awo ng'emyaka gya 1990 ginaatera okuggwaako, ebbeeyi y'amafuta yeeyongedde okulinnya era bangi basaba wabeewo ebintu ebirala ebikozesebwa mu kifo ky'amafuta.