This doughnut chart sample illustrates the renewable energy sources. It was designed on the base of the Wikipedia file: Example of a doughnut chart.png.
This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 License. [creativecommons.org/licenses/by-sa/3.0/]
"Renewable energy is generally defined as energy that is collected from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy often provides energy in four important areas: electricity generation, air and water heating/cooling, transportation, and rural (off-grid) energy services." [Renewable energy. Wikipedia]
The donut chart example "Renewable energy" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Pie Charts solutiton of the Graphs and Charts area in ConceptDraw Solution Park.