Hydrogen has a low energy density by weight.

Hydrogen has a low energy density by volume.

Hydrogen is very challenging and dangerous to transport.

The input of energy to produce hydrogen is often greater than the energy of the resulting hydrogen.

Existing infrastructure for manufacturing and transporting hydrogen is minimal to nonexistent.

Hydrogen has a low energy density by weight.

Hydrogen has a low energy density by volume.

Hydrogen is very challenging and dangerous to transport.

The input of energy to produce hydrogen is often greater than the energy of the resulting hydrogen.

Existing infrastructure for manufacturing and transporting hydrogen is minimal to nonexistent.

Ethanol made from cellulosic plants

Ethanol made from corn

Biodiesel made from corn

Agricultural wastes

Proton pumps

Ethanol made from cellulosic plants

Ethanol made from corn

Biodiesel made from corn

Agricultural wastes

Proton pumps

Geothermal energy can be harnessed in any region of the world and contribute substantially to the power grid.

Geothermal has proven cost-effective in remote communities where importing fuel is challenging and expensive.

Iceland has been able to utilize geothermal to meet over twenty-five percent of their energy demand, in large part because of the geothermal activity of the region.

While sustainable, geothermal plants do emit small quantities of carbon dioxide and some toxic gases, originally trapped in gas pockets deep below the surface.

Fuel consumption of geothermal plants is insignificant when compared to that of coal and natural gas plants.

Geothermal energy can be harnessed in any region of the world and contribute substantially to the power grid.

Geothermal has proven cost-effective in remote communities where importing fuel is challenging and expensive.

Iceland has been able to utilize geothermal to meet over twenty-five percent of their energy demand, in large part because of the geothermal activity of the region.

While sustainable, geothermal plants do emit small quantities of carbon dioxide and some toxic gases, originally trapped in gas pockets deep below the surface.

Fuel consumption of geothermal plants is insignificant when compared to that of coal and natural gas plants.

A liquid fuel processed from a non-petroleum material such as coal or waste plastics.

Synthetic fuel, derived exclusively from non-organic sources as opposed to organic sources (e.g. biodiesel, ethanol, etc.)

Fuel synthesized in a laboratory as opposed to refined from crude oil

A derivative of waste plastics that results in a form of kerosene

A counterfeit fuel produced by illegitimate companies that can prove harmful to industry when mixed with fuel reserves

A liquid fuel processed from a non-petroleum material such as coal or waste plastics.

Synthetic fuel, derived exclusively from non-organic sources as opposed to organic sources (e.g. biodiesel, ethanol, etc.)

Fuel synthesized in a laboratory as opposed to refined from crude oil

A derivative of waste plastics that results in a form of kerosene

A counterfeit fuel produced by illegitimate companies that can prove harmful to industry when mixed with fuel reserves