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Renewable fuels are fuels produced from renewable resources. Examples include: biofuels (e.g. Vegetable oil used as fuel, ethanol, methanol from clean energy and carbon dioxide [1] or biomass, and biodiesel), Hydrogen fuel (when produced with renewable processes), and fully synthetic fuel (also known as electrofuel) produced from ambient carbon dioxide and water.
Alternative fuels, also known as non-conventional and advanced fuels, [ 1] are fuels derived from sources other than petroleum. [ 2] Alternative fuels include gaseous fossil fuels like propane, natural gas, methane, and ammonia; biofuels like biodiesel, bioalcohol, and refuse-derived fuel; and other renewable fuels like hydrogen and electricity.
A renewable resource (also known as a flow resource[ note 1][ 1]) is a natural resource which will replenish to replace the portion depleted by usage and consumption, either through natural reproduction or other recurring processes in a finite amount of time in a human time scale. When the recovery rate of resources is unlikely to ever exceed a ...
Biomass (in the context of energy generation) is matter from recently living (but now dead) organisms which is used for bioenergy production. There are variations in how such biomass for energy is defined, e.g. only from plants, [ 8] or from plants and algae, [ 9] or from plants and animals. [ 10] The vast majority of biomass used for bioenergy ...
Fossil fuel subsidies are energy subsidies on fossil fuels. They may be tax breaks on consumption, such as a lower sales tax on natural gas for residential heating; or subsidies on production, such as tax breaks on exploration for oil. Or they may be free or cheap negative externalities; such as air pollution or climate change due to burning ...
Bioplastics called drop-in bioplastics are chemically identical to their fossil-fuel counterparts but made from renewable resources. Examples include bio-PE, bio-PET, bio-propylene, bio-PP, [12] and biobased nylons. [13] [14] [15] Drop-in bioplastics are easy to implement technically, as existing infrastructure can be used. [16]
Carbon-neutral fuel is fuel which produces no net- greenhouse gas emissions or carbon footprint. In practice, this usually means fuels that are made using carbon dioxide (CO 2) as a feedstock. Proposed carbon-neutral fuels can broadly be grouped into synthetic fuels, which are made by chemically hydrogenating carbon dioxide, and biofuels, which ...
A fossil fuel[ a] is a carbon compound - or hydrocarbon -containing material such as coal, oil, and natural gas, [ 2] formed naturally in the Earth's crust from the remains of prehistoric organisms (animals, plants and planktons ), a process that occurs within geological formations. Reservoirs of such compound mixtures can be extracted and ...
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