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Ecosystem carbon payback time
The ‘carbon debt’ of biofuels is the number of years it can take to offset the carbon emissions generated by converting land for biofuels. It can take decades or centuries for some pathways to bounce back, depending on ...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Key factors of the Brazilian biofuel sector
Brazil has gradually developed and established an ethanol industry and growing biodiesel sector, offering an example of how countries can develop ‘home-grown’ renewable energy sectors. This development has been facili...
01 Mar 2012 - by Nieves Lopez Izquierdo
Brazilian biofuels: infrastructure and crops
Brazil has gradually developed and established an ethanol industry and growing biodiesel sector, offering an example of how countries can develop ‘home-grown’ renewable energy sectors. This development has been facili...
01 Mar 2012 - by Nieves Lopez Izquierdo
From seed and soil to end use
As with every other energy source, biofuels entail some risks and should be assessed over their entire lifecycle. This graphic, From seed and soil to end use, tracks the lifecycle of liquid biofuels for use in the transp...
29 Feb 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Differentiation between crops, land-use and end-use efficiency
The energy gain from biofuels is often expressed as a ratio of biofuel energy output to fossil energy input. However, when considering which biofuels are the most efficient using this metric, allowance must also be m...
01 Mar 2012 - by Nieves Lopez Izquierdo
World biofuels production trends
Production trends indicate that the supply of both ethanol and biodiesel is steadily increasing, although the global ethanol market is more than four times larger than the global biodiesel market. Markets for both ar...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Energy potential from one tonne input: organic matter and landfill material
Dierent biofuels pathways have dierent eciencies in the growth of feedstocks, conversion processes and end-uses. This chain of eciency pertaining to input and output needs to be considered in national planning pr...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Global production of biofuels
Global production of biofuels. In 2009, liquid biofuels provided 2.7 percent of all global road transport fuels.
01 Mar 2012 - by Nieves Lopez Izquierdo
Global ethanol production
The snapshot of biofuel production in this figuere shows global ethanol production currently concentrated in two countries.
01 Mar 2012 - by Nieves Lopez Izquierdo
Global biodiesel production, 2009
Global biodiesel production in 2009.
01 Mar 2012 - by Nieves Lopez Izquierdo
Energy efficiency of fuels - how many kilometres can we drive ?
The picture shows energy efficiency of various fuels.
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Bioenergy, general concept
The development of biorefineries can greatly support efforts to increase resource efficiency. Biorefineries integrate biomass conversion processes and equipment to produce fuel, power, and chemicals from biomass. By p...
01 Mar 2012 - by Nieves Lopez Izquierdo
Wealth of nations and energy consumption
To date, energy use and economic growth have been closely linked. As figure shows, there is a linear relationship between energy consumption and wealth as measured in the Gross Domestic Product (GDP) of nations.
01 Oct 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Green jobs
If properly planned and managed, biofuels can contribute to a number of policy objectives which support the development of the green economy. For example, because agriculture is labour-intensive, job opportunities c...
01 Mar 2012 - by Nieves Lopez Izquierdo
The enlarged biofuels family
Figure illustrates the various feedstocks, which can be converted to biofuels for transport. However, this represents only part of the larger bioenergy family, which covers liquid, solid and gaseous biofuels for differe...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Savings in greenhouse gas emissions by fuel type
Biofuels, in the use phase, emit the carbon that has been previously absorbed during plant growth. Inputs during cultivation and conversion need to be accounted for. However, the bulk of GHG emissions are related to l...
01 Mar 2012 - by Nieves Lopez Izquierdo
Technical and sustainable biomass supply potentials and expected demand for biomass in 2050 (primary energy)
Technical and sustainable biomass supply potentials and expected demand for biomass in 2050 (primary energy).
01 Mar 2012 - by Nieves Lopez Izquierdo
Solar insolation
Solar insolation, the quantification of energy per surface area on the ground, can be used as an indicator for the potential for solar energy. This graphic presents solar insolation, calculated to annual averages from mo...
20 Jul 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
BSR energy intensity
Graphics from the year 2000 Baltic 21 biannual indicator-based status report on sustainable development in the Baltic Sea Region (Baltic 21 Series No 1/2000). The graphic shows a slight decline in energy intensity from 1...
10 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
BSR renewable energy versus total final energy supply
Graphics from the year 2000 Baltic 21 biannual indicator-based status report on sustainable development in the Baltic Sea Region (Baltic 21 Series No 1/2000). The graphic shows an increase in the ratio of renewable energ...
10 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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