The general trend of climatically-driven treeline advance is modified by regional, local and temporal variations. Treelines will not advance in a closed front parallel to the shift of any isotherm to higher elevations and more northern latitudes. The effects of varying topography on site conditions and the after-effects of historical disturbances by natural and anthropogenic factors may override the effects of slightly higher average temperatures. Moreover, the varying treeline-forming species respond in different ways to a changing climate.

Land is very important natural resource to the human being as it provides the basis for more than 95% of human food. On the broader context, land has many other functions, e.g. provision of biological habitats and physical and connective space; regulation of hydrology and climate; storage of minerals, raw materials and historical/pre-historical records; and as a buffer to control waste and pollution. Expanding human requirements and economic activities are placing ever increasing pressures on land resources, creating competition and conflicts and resulting in suboptimal use of land.

Paul Wolfowitz, President of the World Bank, discussed how to meet the rising demand for energy while reducing our carbon footprint. Rich countries need to lead by example, renovating and replacing infrastructure and investing in clean technology. Rich countries also need to lead with direct support to developing nations, both to reduce poverty and reduce carbon emissions. Moving to a low carbon path will require investments, and a long-term equitable global regulatory framework to reduce greenhouse gas emissions.

Some of the most important impacts of global climate change will be felt among the populations, predominantly in developing countries, referred to as ‘‘subsistence’’ or ‘‘smallholder’’ farmers. Their vulnerability to climate change comes both from being predominantly located in the tropics, and from various socioeconomic, demographic, and policy trends limiting their capacity to adapt to change.

Paul Wolfowitz, President of the World Bank, remarked that we are seeing today an emerging global consensus that we must do something about climate change. But equally important is the agenda to reduce poverty. We face this double challenge of reducing damaging carbon emissions, and still meeting the energy demands of the world’s poor.

Although there are many uncertainties around quantitative assessments of climate change impact and water resource management, what is certain is that the climate is changing and this will have an effect on water resources.
This case study considers the economic consequences of water resource scarcity, particularly as it relates to the poor and small municipalities. The author is concerned that, in the case of water, economic principles where price adjustments to an increasingly scarce resource will balance demand, do not apply.

Biofuels are attracting increased attention and investment as an alternative to fossil-based fuels and a means of combating climate change, yet there are many critics. This one-page briefing explores some of the concerns surrounding biofuels and the limitations posed by large-scale biofuel production.
Key points highlighted include the following:

Production systems in low-income developing countries are generally poorly diversified, focusing on rainfed staple crop production and raising livestock. These activities are inherently risky and investment and production decisions by farm households are therefore made within environments that are affected by risk. Because of poorly developed or absent credit and insurance markets it is difficult to pass any of these risks to a third party.

Booklet

There is important evidence to suggest that corruption is a key factor contributing to the degradation of renewable natural resources. Forestry officials and law enforcement officers who are in the pockets of corrupt logging firms often turn a blind eye to activities that threaten the sustainable management of a forest’s biodiversity. Similarly, fishery inspectors endanger stocks when they accept bribes to ignore official quotas for trawlers.

The current debate on climate change, its impacts on socio-ecological systems and the role of agriculture has shifted from an emphasis on how to mitigate the effects of increasing greenhouse gas (GHG) emissions to how to prepare and adapt to the expected adverse impacts. This follows the recognition that the climate is already changing as a result of mankind’s activities and there is little that can be done to prevent further increases in atmospheric concentrations of GHG in the short term.

Each year, tens of thousands of people in Bangladesh are internally displaced as a consequence of riverbank erosion. Yet, such erosion does not draw the attention of policy makers in the same way that other natural disasters do and as a result, a number of coping mechanisms are employed by those affected, with the burden of displacement largely falling on women. This brief argues that instead of attempting to alter the course of nature, it is time to address the institutional mechanisms needed to help affected people cope with displacement and their material and social loss.