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In contrast to tidal power, ocean wave energy plants do not make use of the energy difference between high tide and low tide, but generating energy from continuous wave motion. So, wave energy generation is the conversion of the forces from the motion of waves into usable energy.

Wave energy is considered a form of hydropower, although it is the wind blowing over the surface of the ocean causing waves. So in many ways, wave energy is also wind energy - with all the pros and cons.

There were 140,000 fuel cell stacks shipped globally in 2010

although, as of 2010, no public company in the industry had yet become profitable

Hydrogen has the highest energy content of any common fuel by weight,

PEM Fuel Cell Applications

All Soymet biofuel products have zero petroleum toxins and lower emissions. Primary byproducts are carbon dioxide and water vapor. These biodiesel fuels burn cleanly and produce the same amount of energy as conventional diesel fuels.

Tidal energy is most sustainable and beneficial as a tool in a larger tool belt of renewable energy sources needed to meet our energy demands.

Unlike other renewable energy sources, biomass can be converted directly into liquid fuels, called "biofuels," to help meet transportation fuel needs

Today, ethanol is made from starches and sugars, but NREL scientists are developing technology to allow it to be made from cellulose and hemicellulose,

But as much as it poses a health risk, a group of researchers from the National Renewable Energy Laboratory point out that the relative risks are still light when compared to the use of fossil fuels

First of all, biofuels come in many varieties, but in general, there are two main products, those that replace (or blend with) gasoline, and those that replace (or are blended with) middle distillate fuels, such as diesel fuel, or home heating oil.

Types of soot include: Wet Smoke Residues - Result from smoldering fires with low heat. Residues are sticky, smeary and with pungent odors.  Smoke webs can be difficult to clean. Dry Smoke Residues - Result from fast burning fires at high temperatures. Residues are often dry, powdery, small, nonsmeary smoke particles. Protein Residues - Virtually invisible residues that discolor paints and varnishes.  Extreme pungent odor. Fuel Oil Soot - Furnace puff backs distribute fuel oil soot. Other Types of Residues - Tear gas, fingerprint powder, and fire extinguisher residues also need cleanup.

The most important advantage of using liquid as fuel is that they can be easily pumped and can also be handled easily.

Biofuels are the best way of reducing the emission of the greenhouse gases.

Some of the major producers and users of biogases are Asia, Europe and America. Theoretically, biofuel can be easily produced through any carbon source; making the photosynthetic plants the most commonly used material for production. Almost all types of materials derived from the plants are used for manufacturing biogas. One of the greatest problems that is being faced by the researchers in the field is how to covert the biomass energy into the liquid fuel