Renewable Energy researchers are making research and development attempts towards finding other sources of renewable energy. It would not be science-fiction to have renewable energy from dirt and microbes, liquid magma, or pedestrian steps. There are research projects on such alternative sources that are beyond solar, wind, other forms of geothermal energy, and hydropower.
Underground Liquid Magma: In Iceland, attempts are being made to tap into liquid magma which is deep under the Earth’s surface reaching 1,0000C (18320F). The magma is expected to produce 10 times more electricity than the typical geothermal sources.
Wind Energy from trees: Scientists are trying to study how vibrations of tree movement can generate useable energy. This was also proven by using tree-like L-shaped steel beam which was wrapped with polyvinylidene fluoride (PVDF), and a piezoelectric material (which could be used on full-grown trees in natural forests).
Bacteria and dirt batteries: Harvard University scientists have come up with microbial fuel cell (MFC) batteries which are powered by dirt. This energy-storage-breakthrough will benefit countries where the power grids are absent or unstable.
Las Vegas kinetic streetlights: People walking on sidewalks in Las Vegas, their footsteps are generating clean and renewable electricity. New-York based, EnGoPLANET, has installed special streetlights which are powered by kinetic energy pads and are embedded in the walkways to harvest.
Living Bricks: Houses will have living bricks and will be energy-generating machines. The concept of living bricks is to use the metabolic power of microbes to convert sunlight, air, and wastewater into clean energy.
Swedish Trash: In an attempt to find a way to turn waste to energy, Sweden is trying to divert its garbage and landfills to the waste-to-energy (WTE) plants, which will turn this to electricity.
Research is also being done on algae, urine cells, semi-solid waste, alligator fat and more, to find alternative forms of renewable energy.