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Tag: Productivity

Projected changes in cereal productivity in Africa, due to climate change – current climate to 2080
Water is essential not only to survival but is also equally or even more important than nutrients in food production. Agriculture accounts for nearly 70% of the water consumption, with some estimates as high as 85% (H...
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
Tropical agriculture
There is great potential to restore carbon in tropical agricultural soils through management practices that, in the right circumstances, can also increase productivity. Agroforestry can offer particularly large carbon ...
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Wastewater, a global problem with differing regional issues
The significance of wastewater and contents of wastewater vary greatly between and even within regions. In Africa for example, it is the impact on people’s health that is the major factor, in Europe, the input of nutrien...
01 Mar 2010 - by UNEP/GRID-Arendal
Wastewater, Health and Human well being - Investing in water supply and sanitation
Investment to improve basic access to a safe water source and sanitation (WHO scenario A) can have a significant return with the largest impact on health in particular averting diarrhoea cases and time saved (increasing ...
01 Mar 2010 - by UNEP/GRID-Arendal
The Arctic and the World - migration paths
The Arctic plays host to a vast array of biodiversity, including many globally significant populations. Included among these are more than half of the world´s shorebird species, 80% of the global goose populations, sever...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Trends in Arctic vegetation productivity 1982-2005 (Greening of the Arctic)
Arctic vegetation has undergone enormous change in the past, most notably in response to the glacial and interglacial periods of the Quaternary. Data from many sources and at several scales suggest that recent climate ch...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Arctic biodiversity - pressures and impacts
The Arctic plays host to a vast array of biodiversity, including many globally significant populations. Included among these are more than half of the world´s shorebird species, 80% of the global goose populations, sever...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
The Arctic and the World - migration paths
The Arctic plays host to a vast array of biodiversity, including many globally significant populations. Included among these are more than half of the world´s shorebird species, 80% of the global goose populations, sever...
01 May 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
Arctic biodiversity - pressures and impacts
The Arctic plays host to a vast array of biodiversity, including many globally significant populations. Included among these are more than half of the world´s shorebird species, 80% of the global goose populations, sever...
01 May 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
Climate change impacts that could affect attainment of the Millennium Development Goals
Sustainability in the Latin American and Caribbean countries may be affected by climate change impacts. Costs associated with climate change can intensify budget constraints as countries attempt to reduce poverty and wor...
22 Nov 2010 - by Nieves López Izquierdo, Associate Consultant UNEP/GRID-Arendal
Greenhouse gas intensity of national economies
The national greenhouse gas intensity measures the quantity of GHG emissions in relation to the economic output of a country and is independent of the absolute quantity of GHG emitted. Other ways to represent GHG emissio...
05 Jan 2009 - by UNEP/GRID-Arendal
Nitrate levels: concentrations at river mouths
Nutrients are essential to life. In aquatic systems, nitrogen and phosphorus are the two nutrients that most commonly control the growth of aquatic plants, algae and bacteria. Nitrogen and phosphorus are considered to be...
26 Jan 2009 - by Philippe Rekacewicz
Cereal productivity in sub-Saharan Africa under a projected Intergovernamental Panel on Climate Change (IPCC) scenario
A majority of the population in sub-Saharan African lives in rural areas, where income and employment depend almost entirely on rain-fed agriculture. This population is today at high risk. Sub-Saharan Africa already has ...
26 Jan 2009 - by Philippe Rekacewicz
Coral reefs at risks
There are two distinct regions in which coral reefs are primarily distributed: the Wider Caribbean (Atlantic Ocean) and the Indo-Pacific (from East Africa and the Red Sea to the Central Pacific Ocean). - The diversity o...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
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