Climate notes: Fossil energy a dead-end street

Approximately 80 percent of worldwide energy demand is currently met by mineral oil, coal and natural gas. The share of non-fossil energy - from renewable energy and nuclear power - in total energy consumption of 135 countries is still small. In 2007 only 22 countries met their demand for energy to 20 percent or more from non-fossil energy sources, and 18 countries between 10 and 20 percent. This article discusses some of the energy alternatives.