Tag: Land

Women in government decision-making positions in 1998
Women are responsible for most household work (and in many parts of the world the majority of agricultural production), but women’s rights to own land or control resources are constrained, often by traditional customs an...
29 Nov 2007 - by Philippe Rekacewicz, assisted by Lucie Dejouhanet, UNEP/GRID-Arendal
Contribution of ecosystems to historical radiative forcing and current greenhouse gas emissions
Radiative forcing caused by changes in atmospheric composition, alteration in land surface reflectance (albedo), and variation in the output of the sun for the year 2000 relative to conditions in 1750.
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Changes in agricultural land (pasture and cropland)
For all developing countries over the period 1961–99, expansion of harvested land contributed only 29% to growth in crop production versus the contribution of increases in yields, which amounted to 71%; in sub-Saharan Af...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Number of flood events by continent and decade since 1950
Roughly 17% of all the urban land in the United States is located in the 100-year flood zone. Likewise, in Japan about 50% of the population lives on floodplains, which cover only 10% of the land area. In Bangladesh, the...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Greenhouse gas (GHG) emissions by source, 2004
Overall, agriculture (cropping and livestock) contributes 13.5 % of global greenhouse gas emissions mostly through emissions of methane and nitrous oxide (about 47% and 58% of total anthropogenic emissions of CH4 and N2O...
03 Jan 2008 - by IAASTD/Ketill Berger, UNEP/GRID-Arendal
Changes in available water in Africa: end of 20th and 21st centuries
Salinization affects about 10% of the world’s irrigated land, while the loss of biodiversity and its associated agroecological functions (estimated to provide economic benefits of US$ 1,542 billion per year) adversely af...
03 Jan 2008 - by IAASTD/Ketill Berger, UNEP/GRID-Arendal
Land area: Conventional and genetically modified crops
While many regions are actively experimenting with GMOs at a small scale, the highly concentrated cultivation of GM crops in a few countries (nearly three-fourths in only the US and Argentina, with 90% in the four countr...
03 Jan 2008 - by IAASTD/Ketill Berger, UNEP/GRID-Arendal
Greenhouse gas emissions from agriculture and land use
Changes in land use have negatively affected the net ability of ecosystems to sequester carbon from the atmosphere. For instance, the carbon rich grasslands and forests in temperate zones have been replaced by crops with...
03 Jan 2008 - by IAASTD/Ketill Berger, UNEP/GRID-Arendal
Poverty mapping study area
This map represents the study area for the poverty mapping project for West Africa for generation of reliable statistical and cartographic products to communicate the relationship between rural poverty and land use poten...
11 Feb 2008 - by Emmanuelle Bournay, Philippe Rekacewicz, UNEP/GRID-Arendal
The economy of legal wildlife trade
The trade in wild species can contribute significantly to rural incomes, and the effect upon local economies can be substantial. The high value of wildlife products and derivatives can also provide positive economic inc...
12 May 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
The development potential - available land per capita, in land use class
The amount of land area available per capita provides a rough measure on the current carrying capacity for food security and for the development of additional agricultural products for export – such as biofuels. The calc...
12 May 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Natural resource - water (freshwater run-off)
Freshwater – a natural resource which has been adopted as a human right by the UN in 2002: 'the human right to water entitles everyone to sufficient; affordable; physically accessible; safe and acceptable water for perso...
12 May 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Climate change - ice and snow and the albedo effect
Changes in the polar regions can cause more warming in the entire planet earth system through feedback effects. One such effect is the reduction of ice and snow due to warmer temperatures. When the white and gray snow an...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Biofuels production 1975-2005 (ethanol and biodiesel)
Biofuels have grown quickly in demand and production (Figure 14), fuelled by high oil prices and the initial perception of their role in reducing CO2 emissions (FAO, 2008). Biofuels, including biodiesel from palm oil ...
02 Feb 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
An increasing number of countries are leasing land abroad to sustain and secure their food production
The world regions are sharply divided in terms of their capacity to use science in promoting agricultural productivity in order to achieve food security and reduce poverty and hunger. For every US$100 of agricultural ...
02 Feb 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
Possible individual ranges of yield and cropland area losses by 2050
Figure 24: Possible individual ranges of yield and cropland area losses by 2050 with climate change (A2 scenario), non-food crops incl. biofuels (six OECD scenarios), land degradation (on yield and area, respectively, s...
02 Feb 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
Potential for cropland expansion
Current projections suggest that an additional 120 million ha – an area twice the size of France or one-third that of India – will be needed to support the traditional growth in food production by 2030, mainly in deve...
02 Feb 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
Projected land use changes
A central component in preventing loss of biodiversity and ecosystem services, such as provisioning of water, from expanding agricultural production is to limit the trade-off between economic growth and biodiversity b...
02 Feb 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
Biofuels production 2005, by country (ethanol and biodiesel)
Production of crops for biofuels also competes with food production (Banse et al., 2008). Indeed, the corn equivalent of the energy used on a few minutes drive could feed a person for a day, while a full tank of ethan...
02 Feb 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
Carbon cycle
Living systems play a vital role in the carbon cycle. Photosynthesising organisms – mostly plants on land and various kinds of algae and bacteria in the sea – use either atmospheric carbon dioxide or that dissolved in se...
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Previous | 1 2 3 4 5 6 7 8 9 | Next