Annika Carlsson-Kanyama

Potential contributions of food consumption patterns to climate change

Anthropogenic warming is caused mainly by emissions of greenhouse gases (GHGs), such as carbon dioxide, methane, and nitrous oxide, with agriculture as a main contributor for the latter 2 gases. Other parts of the food system contribute carbon dioxide emissions that emanate from the use of fossil fuels in transportation, processing, retailing, storage, and preparation. Food items differ substantially when GHG emissions are calculated from farm to table. A recent study of approximately 20 items sold in Sweden showed a span of 0.4 to 30 kg CO(2) equivalents/kg edible product. For protein-rich food, such as legumes, meat, fish, cheese, and eggs, the difference is a factor of 30 with the lowest emissions per kilogram for legumes, poultry, and eggs and the highest for beef, cheese, and pork. Large emissions for ruminants are explained mainly by methane emissions from enteric fermentation. For vegetables and fruits, emissions usually are </=2.5 kg CO(2) equivalents/kg product, even if there is a high degree of processing and substantial transportation. Products transported by plane are an exception because emissions may be as large as for certain meats. Emissions from foods rich in carbohydrates, such as potatoes, pasta, and wheat, are <1.1 kg/kg edible food. We suggest that changes in the diet toward more plant-based foods, toward meat from animals with little enteric fermentation, and toward foods processed in an energy-efficient manner offer an interesting and little explored area for mitigating climate change.

Food and life cycle energy inputs: consequences of diet and ways to increase efficiency

Food consumption is one of the most polluting everyday activities when impacts during product life cycles are considered. Greenhouse gas emissions from the food sector are substantial and need to be lowered to stabilise climate change. Here, we present an inventory of life cycle energy inputs for 150 food items available in Sweden and discuss how energy efficient meals and diets can be composed. Energy inputs in food life cycles vary from 2 to 220 MJ per kg due to a multitude of factors related to animal or vegetable origin, degree of processing, choice of processing and preparation technology and transportation distance. Daily total life cycle energy inputs for diets with a similar dietary energy consumed by one person can vary by a factor of four, from 13 to 51 MJ. Current Swedish food consumption patterns result in life cycle energy inputs ranging from 6900 to 21,000 MJ per person and year. Choice of ingredients and gender differences in food consumption patterns explain the differences. Up to a third of the total energy inputs is related to snacks, sweets and drinks, items with little nutritional value. It is possible to compose a diet compatible with goals for energy efficiency and equal global partition of energy resources. However, such a diet is far from the Swedish average and not in line with current trends.

Climate change and dietary choices -- how can emissions of greenhouse gases from food consumption be reduced?

Abstract Results from an analysis of greenhouse gas emissions and energy consumption during the life-cycle of carrots, tomatoes, potatoes, pork, rice and dry peas consumed in Sweden are presented and discussed. The life-cycle is delineated to the part of the production chain prior to purchase by the consumer. The study shows that emissions, expressed in g CO2 equivalents, are highest for pork and rice and lowest for potatoes, carrots and dry peas. The most important stages of emissions in the life-cycle are identified for each of the different food items. Crop farming is the most important stage for rice and tomatoes while rearing of animals is the most important stage for pork and storage is the most important stage for carrots. Comparison with an energy analysis shows that important stages in the life-cycle of food may be under-evaluated when energy only is accounted for. This may lead to a sub-optimisation of pollution control exemplified by the case of transportation. Also, it is shown that the choice of functional unit has a decisive influence on the outcome of the study. The recommendation is to compare whole meals, or diets with the same nutritional qualities. A comparison of four meals composed of the food items under analysis shows that a meal with tomatoes, rice and pork has nine times higher emissions than a meal made from potatoes, carrots and dry peas. Emissions of greenhouse gases from consumption patterns based on the food items analysed are compared with an assumed sustainable limit of greenhouse gas emissions. The conclusion is that current food consumption patterns in the developed countries exceed the level of sustainability by at least a factor of 4. Prospects for achieving sustainable food consumption patterns are questionable in view of current trends in food demand.

Travel patterns and environmental effects now and in the future:: implications of differences in energy consumption among socio-economic groups

Travel patterns among different socio-economic groups in Sweden are investigated. It is shown that elderly persons, persons with low incomes and women in general do not travel extensively. Middle-aged persons, persons with high incomes and men travel much farther. Cars are the dominant transportation mode for all population groups. Aeroplanes are used mostly by high-income earners and men, while public transportation is mostly used by young people and women. Energy consumption for the different travel patterns differs substantially. Men with high incomes consume the most energy, with 94 000 MJ during one year, while elderly women consume 12 000 MJ. When compared to a calculated sustainable level of energy consumption for travel, most population groups are in excess. The level for sustainable energy consumption is calculated based on an assumed global potential for renewable energy of 360 EJ per year, divided equally among the global population. A certain share of this energy potential is supposed to be used for travelling. A scenario for 2020 is presented in which vehicle energy efficiency has increased and travel patterns have changed from what they are today. Sustainability can only be reached when both travel patterns and vehicle technology have changed radically. Differences in energy consumption for travel due to age and gender are likely to remain in the future. Scientific knowledge from the social domains seems to be important for devising efficient strategies for a sustainable society. Current focus on policy measures has been mainly on technical issues.

Indirect and direct energy requirements of city households in Sweden - Options for reduction, lessons from modeling

The objective of this article is to explore the potential for lowering household energy use given existing local support systems, in this case in the Stockholm inner city with the aid of the Dutch ...

Voluntary agreements - a measure for energy-efficiency in industry? Lessons from a Swedish programme

Voluntary agreements represent a policy instrument for applying new knowledge, routines or technology to specified issues. The traditional role of an authority when using information, and taking economic, or administrative measures is that of an initiator and controller. Voluntary agreements, on the other hand, represent a communication process between an authority and a partner where relations of dependency and mutuality are more important in advancing the programme. This article analyses and discusses the motivational aspects of voluntary agreements, the role of the contract, advising, information, education, time planning and the importance of reporting and evaluation in energy-efficiency programmes. Besides sociological and communication theories, the discussion is based on the outcome of an evaluation of a Swedish energy-efficiency programme. Among the conclusions are that communication processes have to be planned and implemented in time sequences and steps of measures, which was partially neglected in the Swedish programme. Also, agreements between partners have to be defined in ways valid for all partners. In the Swedish programme, quantitative goals, at least measured in kWh, were impossible to achieve for some industries. On the other hand, most industries reported progress in side effects of energy efficiency as for example transportation policy for products, recirculation of waste material, lighting policy and behaviour, qualifications for ISO labelling. Information in combination with voluntary agreements can be efficient for industrial energy conservation. The education and auditing that was part of the Swedish programme were highly appreciated and added to the achievements.

Trends in food production and consumption: Swedish experiences from environmental and cultural impacts

Changes in Swedish food consumption patterns during recent decades are studied, together with some possible future changes of importance for increasing resource efficiency. The increased consumption of meat and a more global food supply have contributed negatively. An increased interface with foreign food cultures through travelling and immigration are the main causes of these consumption changes. Meat consumption may decline while the consumption of organic and convenience foods may increase in the future. Environmental and health reasons will be the main causes, together with an increased acceptance among younger people of food cultures with vegetarian ingredients. Lack of time and skills for cooking and an increased supply of convenience foods are other causes. The environmental consequences of changes in food cultures may be beneficial, but that depends partly on the locations of food industries and producers as well as on methods used in farming and the food industry.

Farmers' markets - linking food consumption and the ecology of food production?

Urban and industrialised societies usually involve little connection between consumers and the resource base upon which the production of goods depends. Changing this situation could potentially enhance social and ecological sustainability. This study explored ecological aspects of the educational role of local food supply, with the aim of identifying signs of enhanced consumer understanding or awareness of the ecology of food production resulting from producer–consumer interaction. A series of qualitative interviews were carried out with customers at a farmers’ market in Stockholm. The results showed that the interviewees were mainly concerned with quality, price and taste, and not production conditions. In addition, a number of interviewees experienced a sense of trust when shopping at the market. We found few examples of contributions to ecological knowledge among customers at the market, but there were some examples of learning opportunities. The local food supplied by the market reminded customers of the seasonality of production. Stallholders also provided information on how to store, prepare and cook vegetables, which may encourage a change in diet that is preferable from an environmental standpoint.

Weighted average source points and distances for consumption origin-tools for environmental impact analysis?

Abstract This paper presents two methods to quickly assess how local peoples consumption is dependant on sources other than local or domestic. Weighted average source points (WASPs) or weighted average source distances (WASDs) for consumption origin are calculated and used to illustrate the extent to which the goods consumed come from places other than where the consumer lives. Two case-studies show the practicability of the methods. The first is a comparison between the consumption origins of tomatoes and carrots and the second a comparison between grape consumption origins in 1965 and 1992. Both the WASP and the WASD methods are easy to use and the results can be communicated in illustrative ways. These methods, however, give only an estimate of possible environmental impacts.

Integrating climate change adaptation into civil protection: comparative lessons from Norway, Sweden and the Netherlands

Integrating policy on climate change adaptation into civil protection is explored through studies of extreme weather management at the national level in Norway, Sweden and the Netherlands, and through local case studies of the three coastal cities of Bergen, Malmö and Rotterdam. The research issues addressed have been the extent to which, and in what form, climate change adaptation policy has been integrated into civil protection, how the observed policy integration can be explained and how such integration can be improved. Different degrees of policy integration may stem from perceived vulnerabilities and varying needs for renewed legitimacy within the civil protection system following the end of the Cold War. A set of socio-historic characteristics of the “environment” and “civil protection” policy domains illuminate conditions for an improved outcome of the policy integration process.