Energy from rivers and seas

Energy extracted from the marine environment is, on the one hand, the most capital intensive form of energy, but, on the other, offers the longest-term energy certainty coupled with the highest energy density.

Energy can be derived from water according to four basic principles: first, hydroelectricity from the damming of rivers; second, from hydrodynamics or the movement of water by virtue of tidal rise and fall, tidal currents and waves; third, the dynamics of thermal difference; and fourth, the extraction of hydrogen from water via electrolysis. This chapter focuses on the first and second technologies.

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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