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In this literature review, measures of reducing the ammonia (NH3) emissions from pig production are described, with focus on systems that can be used under Swedish conditions. The entire production chain with feed, housing, manure storage and application on the field is described and taken into consideration. However, in order to limit the study, the production of crops for feed is not included. As compared to many other countries, emissions of NH3 in Swedish pig production are already low, due to low protein levels in the feed, housing systems with a small excretory area, and storage of slurry outside the building. Lowering the crude protein level from 14.5 % to 12.5 % would reduce NH3 emission by 20 % from the pig house. Including fiber in the feed, leads to a shift from nitrogen in the urine towards more nitrogen in the faeces. In combination with removing the manure daily from the pig house, this might give opportunities for reducing NH3 emissions. A reduction in NH3 emission of up to 50 % might be possible. However, using fiber leads to higher methane (CH4) emissions (from animal and housing), and therefore this should be combined with biogas production. More research is needed in this field. Adding acids or salts to the feed could reduce NH3 emission by up to 40 %, while also improving feed conversion efficiency. Of course, good practice when preparing the feed must be followed. By applying multi-phase feeding and feeding according to the sex of the animals, NH3 emissions could be reduced by 5-15 %. By reducing feed spillage, offering a good environment for the pigs and maintaining good pig health, nitrogen losses could also be reduced with about 5 – 15 %. The importance of having clean pens is also discussed in this literature survey. Swedish housing systems, having a relatively high percentage of solid flooring (with some bedding) and a small excretory area in the pen, provides an opportunity for reducing NH3 emissions from the housing system. However, one prerequisite for this is that the pigs keep the pens clean, and therefore the room temperature should not be too high. This means that during hot periods, the air has to be conditioned before entering the pig house, e.g., by taking in the air via channels under the building. Removing manure daily by means of scrapers (reduction up to 40 %) and cooling the manure under the slats (reduction up to 50 %) are measures that are already implemented in Swedish pig production. The effect of air temperature, air flow and ventilation system are also discussed. Cleaning the exhaust air using bio-filters (up to 65 % reduction), bio-scrubbers (up to 70 % reduction) and chemical scrubbers (up to 96 % reduction) is also an option. By only purifying the exhaust air from the manure channels, the costs for this method can be reduced substantially. The emissions of CH4 and nitrous oxide (N2O) from the housing system are also discussed. Removal of the manure under the slats appears to reduce CH4 emission from the building. The use of deep-litter bedding may in many cases result in high N2O emissions. More research is needed in this field. Treating the manure with sulphuric acid, in combination with aeration and re-circulation in the pig house, can reduce NH3 emissions by up to 70 %. Pumping slurry between different compartments in a pig house is not allowed according to the Swedish Welfare Legislation. Therefore it is not certain that the acidification of slurry, inside the pig house, can be applied in Sweden. Anaerobic treatment of biogas production, as another treatment of manure, may not reduce NH3 emissions when storing and spreading the manure, but it results in increasing the nitrogen availability for the crops. In that way nitrogen losses can be reduced since less nitrogen has to be spread per hectare. Besides, biogas production reduces odour problems as well as emissions of green house gas (GHG) by the production of energy and lower CH4 emissions. Aerobic treatment of manure, can reduce the emissions of NH3 and GHG. However, poorly controlled aeration processes can have the opposite effect. Storage of slurry in a tank having a cover lid has been pointed out in many investigations, to be the easiest and most effective way of reducing NH3 and CH4 emissions. The straw used for fattening pigs is mainly consumed by the pigs, and it is rare that a naturally stable crust will be developed on the slurry. However, within piglet production a crust on the slurry tank is often found. This crust can cause problems when the slurry tank is covered. Technical solutions have to be developed to solve this problem. On pig farms, the main crops are cereals, and the slurry is mainly applied either in the spring during tillage work, or band spread in the early summer on growing cereals. Incorporation of the slurry, e.g., by harrowing in the spring, effectively reduces the NH3 losses if it takes place as soon as possible after spreading, preferably directly or at least within 4 hours after spreading. Another possibility is to band spread the slurry onto the growing cereals because the canopy provides a microclimate which reduces the NH3 losses, as compared to spreading on a bare field. Late application during the vegetation period or spreading before the autumn sowing, often results in lower nitrogen utilization by the plants, and thereby higher risks of nitrogen leakage. Due to interactions between different sources on a farm, reduction in NH3 emission from the individual sections of the livestock production system cannot be simply added to give the net reduction in emission from the total system. Thus a whole farm system approach is needed for devising control strategies for reducing NH3 emission. Four scenarios were evaluated in this report. Scenario 1 consists of: Reduction of the crude protein in the feed from 14.5 % to 12.5 %, relatively simple technique inside the pig house to reduce NH3 emission, covering the slurry tank and new technique when spreading manure. Scenario 2 consists of: Using biproducts from industry (16.5 % crude protein instead of 14.5 %) and cleaning of exhausting air, covering the slurry tank and new technique when spreading manure. Scenario 3 comprises conditions similar to those of Scenario 1, including high dietary feed fiber content in combination with biogas production. Scenario 4 comprises conditions similar to those of Scenario 2, including high dietary feed fiber content and in combination with biogas production. Preliminary calculations indicate that the scenarios may reduce emissions by 47-68 %. It should be pointed out that the calculations are still very uncertain. The calculations show that Scenario 3 appears to be the most effective way of reducing NH3 emissions. So the combination of using low protein feed with high fiber content together with the production of biogas appears to be a promising method for future development. Even Scenario 1, which used only simple techniques, has a significant result: lowering the protein content affects the entire chain from feed to the field. From the literature review, it can be concluded that one should consider whole farm systems when trying to reduce NH3 emissions. Having a roof on the manure storage, using band spreading together with incorporation, e.g. harrowing, within a few hours after spreading, are the most important and easiest ways of reducing NH3losses. When discussing the method of animal keeping, feeding and housing, a low protein level in the feed has a positive effect along the entire production chain, and appears to be the most effective means of reducing NH3 emissions. Using more fiber or acids/salts in the feed will reduce the NH3 emission even more. When biproducts from industry are used in the pig feed, cleaning the exhausting air from the manure channel may be an option. More research is needed before recommendations can be given.

This document summarises the outcome of a regional training workshop, "Interactive and dynamic approaches on forest and land use planning in Southern Africa". It was organised in December 2001 by the government of Botswana in cooperation with organisations in Zimbabwe and South Africa and with Swedish financial and technical support. The workshop aimed at exposing the participants to new cross sector approaches on strategic forest and land use planning, including the Area Production Model (APM) and concept, and to provide a platform for possible future development work in this field. It concerned such issues as the role of planning in relation to policies and local development, information and data needs in planning, the use of scenario modelling in land use planning, how to narrow the gap between "planning from above" and "planning from below", and the roles and interaction of different stakeholders in the planning process. The workshop had been proposed by the participating countries following an international training programme on policy and strategy development in Sweden. The 18 participants from three countries included central and local government staff concerned with forest and land use planning at the national and sub-national level, researchers and NGOs. The workshop consisted of two weeks of lectures, seminars and field based case studies and a concluding seminar, in which the participants presented their experiences and conclusions about the APM concept to a broader group of decision makers. Some of the main conclusions drawn by the participants were that the APM was a useful tool for promoting dynamic and multi-sector planning. At the same time the Model has a number of technical shortcomings that needs to be addressed. Those shortcomings were identified and discussed throughout the workshop. The need to keep the model simple and transparent was acknowledged. It was proposed that "homes" should be identified for the model in each country. Those homes should build up and maintain capacity to develop and adapt the model to the local conditions and priorities. INTRODUCTION. The workshop "Interactive and dynamic approaches on forest and land-use planning in Southern Africa" was arranged in Botswana in December 2001. It aimed at exposing the participants to new cross sector approaches on strategic forest and land use planning, including the Area Production Model (APM), and to provide a platform for possible future development work in this field. The workshop was the concluding step of a process that had been running for several years. It provides important lessons on approaches to cross-sectoral land use planning in Southern Africa. The process started in 1998, when there were several participants from Botswana, South Africa and Zimbabwe in an annual international course "Development of National Forest Policies and Strategies", organised by the Swedish National Board of Forestry and funded by Sida. Those participants strongly suggested that the Area Production Model, (APM), which had been demonstrated during the course, might be highly relevant in Southern Africa. As a response, the Country Capacity Building (CCB) project (a Sida funded project aiming at forest policy issues), set up a training programme in discussions with the three countries. As a first step, key personnel from the forest authorities in Botswana, South Africa and Zimbabwe, underwent a post­ graduate course at the Swedish University of Agricultural Sciences (SLU) in Umea, Sweden. The course took place in March 2000 and was focused on the ideas and applications of the APM. In a second step, a workshop designated for a wider audience, including governmental as well as non­ governmental organisations, was planned for mid 2000. The workshop was originally intended to be a two-phase arrangement. The first phase to be arranged in Zimbabwe, focusing on model theory with only limited field work, and a second phase, were the participants would split up and work a realistic case in a designated study area in each of the three countries involved. Unfortunately, the political situation in Zimbabwe during spring 2000 made it necessary to postpone the workshop. About a year later, in spring 2001, it was agreed among the interested countries to move it to another country in the Region, after the Ministry of Agriculture, Botswana, had generously accepted to host the workshop. The two-phase design of the workshop was by now reduced to a single event, with the joint study-area around Serowe in the eastern part of Botswana. The APM is a simulation model developed by Professor Nils-Erik Nilsson in co-operation with FAO. The Model, including an application concept, has been further developed by the Swedish University of Agricultural Sciences (SLU), Department of Forest Resource Management and Geomatics. The Swedish team of resource persons in the Botswana workshop have all been instrumental in the previous development work of the Model. The APM has been field tested on numerous occasions in South and Southeast Asia. This workshop, however, is the first occasion the model is used in Southern Africa. In spite of the simplicity and flexibility that characterises the model, the new setting was considered a major challenge when planning the workshop. The workshop results have given new and partly unexpected results in terms of both usefulness and applicability of the model. The Country Capacity Building project focuses on forest policy development. In modem terminology, nfp (national forest programmes) is a highly relevant term. Key strategies include support to demand driven processes, investment in human knowledge and, not least, a belief that personal commitment is as important for success as political commitments. On behalf of the organisers, I would like to thank the Ministry of Agriculture, Botswana, and the key­ persons from Botswana, South Africa and Zimbabwe. Without their commitment and enthusiasm, the positive outcome of the workshop would not have been possible.

This study investigates the contribution of forest carbon sequestration to a cost-efficient EU climate policy from 2010 to 2050 under conditions of uncertainty. We note that there is a trade-off between sequestration and alternative uses of forests such as bioenergy and timber production. A dynamic and probabilistic cost-minimization model is developed, which includes fossil fuel use within the EU Emissions Trading System and forest management in the EU-27 countries. The results suggest that if policy makers wish to meet emissions targets with 80% certainty, this goal will be eight times more expensive than when they were unconcerned with uncertainty. Policy makers' risk attitudes affect forest management strategy primarily through the inclusion of wood products, where potential carbon emissions reductions are high but also highly uncertain. Excluding wood products from a climate strategy can be expensive if policy maker are insensitive to uncertainty.

The purpose of this paper is to investigate policy instruments for interdependent carbon pools and how they can be applied in the EU climate policy to 2050. Cost-effective policy instruments for forest products which are adjusted for the impact on carbon pools are identified. A numerical, dynamic, chance-constrained model including the EU-27 countries shows that inclusion of only one forest carbon pool can reduce costs and increase emission reductions. Results also suggest that decentralized policy instruments for both carbon pools are less costly than uniform instruments at the EU level.

Forest management affects the quantity of CO2 emissions in the atmosphere by carbon sequestration in standing biomass, carbon storage in forest products and production of bioenergy that replace fossil fuels. The main question in this paper is whether forest sequestration is worth increasing at the expense of bioenergy and forest products to achieve EU's emission reduction target to 2050 cost-effectively. The assessment is based on numerical calculations using a dynamic, partial equilibrium model of cost-effective solutions, where three abatement methods in the forest sector are included together with abatement in the fossil fuel sector. The results show that forest sequestration in standing biomass is cost-effective compared to bioenergy. When sequestration is taken into account, net present costs for meeting EU carbon targets can be reduced by 18%. This is achieved through an increase in annual carbon sequestration by 30-158 million ton CO2. The overall cost of reaching the 80 per cent carbon reduction target amounts to 2,002 billion Euros when sequestration is included in the policy, but increases to 2,371 billion Euros without sequestration. Results suggest that forests can serve as a cost-efficient carbon sink over the considered time period.

The current share of sub-Saharan Africa in global carbon dioxide emissions is negligible compared to major contributors like Asia, Americas, and Europe. This trend is, however, likely to change given that both economic growth and rate of urbanization in the region are projected to be robust in the future. The current study contributes to the literature by examining both the direct and the indirect impacts of quality of institution on the environment. Specifically, we investigate whether the institutional setting in the region provides some sort of a complementary role in the environment-FEG relationships. We use the panel two-step system generalized method of moments (GMM) technique to deal with the simultaneity problem. Data consists of 43 sub-Saharan African countries. The result shows that energy inefficiency compromises environmental standards. However, the quality of the institutional setting helps moderate this negative consequences; countries with good institutions show greater prospects than countries with poor institutions. On the other hand, globalization of the region and increased forest size generate positive environmental outcomes in the region. Their impacts are, however, independent of the quality of institution. Afforestation programs, promotion of other clean energy types, and investment in energy efficiency, basic city infrastructure, and regulatory and institutional structures, are desirable policies to pursue to safeguard the environment.