The study results also indicated that most students were

Graph 1. Sources from which the students first heard the concept of renewable energy.Figure optionsDownload full-size imageDownload as PowerPoint slide
According to the students' answers, 55.7% described secondary school as their first source regarding the concept of renewable energy, while 24.5% described elementary school, 7.9% described the Internet, 4.0% described the media, and 6.7% described their family as their initial source.
The percentage distributions of the student answers to the question, “What PF-2341066 the sources of renewable energy?” are provided in Graph 2.
Graph 2. Student opinions regarding sources of renewable energy.Figure optionsDownload full-size imageDownload as PowerPoint slide
According to the students' answers, 80.4% described the sun as a renewable energy source, while 63.4% described rivers, 62.5% described underground water, 59.8% described the oceans and seas, 41.1% described hydrogen, and 37.3% described biological waste as renewable energy sources. In addition, 22.7% described natural gas, 12.6% described radioactive elements, 12.1% described petroleum, 11.9% described fuel, and 11.5% described coal as sources of renewable energy.