| Food and animal feed from renewable energy, air, and water Provider: the siemens stiftung media portal Language: English |
| The energy of the future – renewable energies Provider: the siemens stiftung media portal Language: English |
| Energy consumption and renewable energies in private households Provider: the siemens stiftung media portal Language: English |
| B6 Renewable energies (link list) Provider: the siemens stiftung media portal Language: English |
| An overview of energy sources Provider: the siemens stiftung media portal Language: English |
| Energy storage Provider: the siemens stiftung media portal Language: English |
| B6.4 Harnessing the energy of wind (student instructions) Provider: the siemens stiftung media portal Language: English |
| Renewable Energies Provider: the siemens stiftung media portal Language: English |
| Energy Market Provider: university of bologna digital library Language: English |
| Solar energy experiments Provider: the siemens stiftung media portal Language: English |