The impacts of reduced oil prices on the economic viability of selected technologies which utilize solar, wind and biomass energy sources are examined. The technologies include dendrothermal, bagasse, fuel alcohol, wind electric, biomass gasifiers, solar water heaters, photovoltaic water pumps,...

In many developing countries, households rely heavily on woodfuels (firewood and charcoal) as their main source of energy for cooking and heating. The internal trade in woodfuels is often sizable. African governments now collect stumpage fees of $30 million a year for fuelwood and charcoalwood,...