Fuentes de imágenes:

https://www.google.es/search?hl=es&q=energ%C3%ADa+de+biomasa&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1024&bih=743&wrapid=tlif133702529136810&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=FGOxT7n_CMOl0QXrzdH8Ag#um=1&hl=es&tbm=isch&sa=1&q=energ%C3%ADa+hidroel%C3%A9ctrica&oq=energ%C3%ADa+hidroel%C3%A9ctrica&aq=f&aqi=g1&aql=&gs_l=img.3..0.150647.154953.11.155105.16.3.0.13.13.0.200.468.0j2j1.3.0...0.0.m278eDe0Idk&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=663eb1e7a3164af6&biw=1024&bih=743

https://www.google.es/search?hl=es&q=energ%C3%ADa+de+biomasa&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1024&bih=743&wrapid=tlif133702529136810&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=FGOxT7n_CMOl0QXrzdH8Ag#um=1&hl=es&tbm=isch&sa=1&q=energ%C3%ADa+solar&oq=energ%C3%ADa+solar&aq=f&aqi=g9&aql=&gs_l=img.3..0l9.27044.28544.13.28672.6.5.0.1.1.0.155.593.1j4.5.0...0.0.zE9O3T1TqIM&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=663eb1e7a3164af6&biw=1024&bih=743

https://www.google.es/search?hl=es&q=energ%C3%ADa+de+biomasa&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1024&bih=743&wrapid=tlif133702529136810&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=FGOxT7n_CMOl0QXrzdH8Ag#um=1&hl=es&tbm=isch&sa=1&q=energ%C3%ADa+e%C3%B3lica&oq=energ%C3%ADa+e%C3%B3lica&aq=f&aqi=g9g-S1&aql=&gs_l=img.3..0l9j0i24.63100.64796.15.65048.7.7.0.0.0.0.201.945.1j5j1.7.0...0.0.YqLTUF5hvp8&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=663eb1e7a3164af6&biw=1024&bih=743

https://www.google.es/search?hl=es&q=energ%C3%ADa+de+biomasa&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1024&bih=743&wrapid=tlif133702529136810&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=FGOxT7n_CMOl0QXrzdH8Ag#um=1&hl=es&tbm=isch&sa=1&q=energ%C3%ADa+de+la+biomasa&oq=energ%C3%ADa+de+la+biomasa&aq=f&aqi=g1g-S4&aql=&gs_l=img.3..0j0i24l4.38020.41758.17.41853.19.12.0.7.7.0.200.1678.1j10j1.12.0...0.0.Z5rcmtWVHkA&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=663eb1e7a3164af6&biw=1024&bih=743

https://www.google.es/search?hl=es&q=energ%C3%ADa+de+biomasa&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1024&bih=743&wrapid=tlif133702529136810&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=FGOxT7n_CMOl0QXrzdH8Ag#um=1&hl=es&tbm=isch&sa=1&q=energ%C3%ADa+geot%C3%A9rmica&oq=energ%C3%ADa+geot%C3%A9rmica&aq=f&aqi=g4g-S6&aql=&gs_l=img.3..0l4j0i24l6.37051.42481.19.42580.25.18.1.6.6.0.208.2369.2j14j1.17.0...0.0.37bCFhv--9M&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=663eb1e7a3164af6&biw=1024&bih=743

https://www.google.es/search?hl=es&q=energ%C3%ADa+de+biomasa&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1024&bih=743&wrapid=tlif133702529136810&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=FGOxT7n_CMOl0QXrzdH8Ag#um=1&hl=es&tbm=isch&sa=1&q=energ%C3%ADa+mareomotriz&oq=energ%C3%ADa+mareomotriz&aq=f&aqi=g4&aql=&gs_l=img.3..0l4.19690.24004.21.24166.20.11.0.9.9.0.186.1335.3j8.11.0...0.0.QvYJCjoTLqk&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=663eb1e7a3164af6&biw=1024&bih=743