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Tag: Agriculture

Forest Carbon Sequestration
Converting land for biofuel production can cause biodiversity impacts in the short-term, but such conversion also aects the future resilience of natural ecosystems. In an extreme case, complete deforestation reduces...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Impact of land conversion on biodiversity
The impacts of land conversion on biodiversity may be significant. The degree of impact relates to many factors, including where and how the bioenergy product is cultivated. This figure represent the short-term impact...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Biodiversity in forests and oil palm plantations, South East Asia
01 Oct 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Biofuels crops and biodiversity
Biofuels pose several environmental and social risks. Therefore, to be truly a part of the green economy, biofuels need to comply with a set of safeguards along the entire production chain. Any bioenergy development ...
08 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Bioenergy from agriculture: factors related to biodiversity
The use of Genetically Engineered Crops (GECs) carries both potential benefits and risks. While it is recognised that they can help to introduce useful traits and increase productivity, there are also concerns about ...
29 Feb 2012 - by Nieves Lopez Izquierdo
Biofuels in China: crop production and water scarcity
In 2009 China produced 2 billion litres of biofuels, ranking the country third behind Brazil and the USA. The Chinese government has set ambitious targets seeing biofuels as not only contributing to the country’s rap...
29 Feb 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Nitrogen runo
Fertiliser and pesticides used to cultivate feedstocks, as well as contaminated effuents discharged from conversion plants, can cause increasing levels of pollution to waterways. This may constrain the growth of biofue...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Agriculture in the Mississippi River Basin
Fertiliser and pesticides used to cultivate feedstocks, as well as contaminated effuents discharged from conversion plants, can cause increasing levels of pollution to waterways. This may constrain the growth of biofue...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Agrochemical use in US agriculture
01 Oct 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Average water requirement for biofuels
The figure shows average water requirement for biofuels. Underlying data need to be interpreted in context. For example, rainfed jatropha is produced in Mali as a biofuel, which means that it receives less water than in ...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Variation in blue water footprints for selected energy crops
Figure compares the water necessary to produce, transport, and convert a given crop into a fuel in two different regions. This shows important variations, and points to the need for careful matching of energy crops a...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Estimated costs and benefits of restoration projects in different biomes
Biodiversity is the basis for any development; it is the natural capital, the stock of natural ecosystems, which provide services for any human activity. As pointed out above, the main immediate threat to biodiversity...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Value of ecosystem services
Biodiversity is the basis for any development; it is the natural capital, the stock of natural ecosystems, which provide services for any human activity. As pointed out above, the main immediate threat to biodiversity fr...
01 Oct 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
CO2 emissions from land conversion for energy crops
The conversion of high carbon-storage ecosystems, such as tropical forest, savannah and peatland into biofuel plants, can neutralise any GHG emission reductions achieved by replacing fossil fuels with biofuels, and ev...
01 Mar 2012 - by Nieves Lopez Izquierdo
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
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