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Livestock'sLong Shadow - executive summery
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This report aims to assess the full impact of the livestock sector on environmental problems, along with potential technical and policy approaches to mitigation. The assessment is based on the most recent and complete data available, taking into account direct impacts, along with the impacts of feed-crop agriculture required for livestock production. The livestock sector emerges as one of the top two or three most significant contributors to the most serious environmental problems, at every scale from local to global. The findings of this report suggest that it should be a major policy focus when dealing with problems of land degradation, climate change and air pollution, water shortage and water pollution and loss of bio-diversity.

Livestock’s contribution to environmental problems is on a massive scale and its potential contribution to their solution is equally large. The impact is so significant that it needs to be addressed with urgency. Major reductions in impact could be achieved at reasonable cost.

Global importance of the sector

Although economically not a major global player, the livestock sector is socially and politically very significant. It accounts for 40 % of agricultural gross domestic product (GDP). It employs 1.3 billion people and creates livelihoods for one billion of the world’s poor. Livestock products provide one third of humanity's protein intake, and are a contributing cause of obesity and a potential remedy for undernourishment.

Growing populations and incomes, along with changing food preferences, are rapidly increasing demand for livestock products, while globalisation is boosting trade in livestock inputs and products. Global production of meat is projected to more than double from 229 million tonnes in 1999/01 to 465 million tonnes in 2050, and that of milk to grow from 580 to 1 043 million tonnes. The environmental impact per unit of livestock production must be cut by half, just to avoid increasing the level of damage beyond its present level. Structural changes and their impact

The livestock sector is undergoing a complex process of technical and geographical change, which is shifting the balance of environmental problems caused by the sector. Extensive grazing still occupies and degrades vast areas of land; though there is an increasing trend towards intensification and industrialisation. Livestock production is shifting geographically, first from rural areas to urban and suburban, to get closer to consumers, then towards the sources of feed stuff, whether these are feed crop areas, or transport and trade hubs where feed is imported. There is also a shift of species, with production of mono gastric species (pigs and poultry, mostly produced in industrial units) growing rapidly, while the growth of ruminant production (cattle, sheep and goats, often raised extensively) slows. Through these shifts, the livestock sector enters into more and direct competition for scarce land, water and other natural resources.

These changes are pushing towards improved efficiency, thus reducing the land area required for livestock production. At the same time, they are marginalising smallholders and pastoralists, increasing inputs and wastes and increasing and concentrating the pollution created. Widely dispersed non-point sources of pollution are ceding importance to point sources that create more local damage but are more easily regulated. Land degradation

The livestock sector is by far the single largest anthropogenic user of land. The total area occupied by grazing is equivalent to 26 % of the ice-free terrestrial surface of the planet. In addition, the total area dedicated to feed-crop production amounts to 33 % of total arable land. In all, livestock production accounts for 70 % of all agricultural land and 30 % of the land surface of the planet.

Expansion of livestock production is a key factor in deforestation, especially in Latin America where the greatest amount of deforestation is occurring – 70 % of previous forested land in the Amazon is occupied by pastures, and feed crops cover a large part of the remainder. About 20 % of the world’s pastures and range lands, with 73 % of range lands in dry areas, have been degraded to some extent, mostly through overgrazing, compaction and erosion created by livestock action. The dry lands in particular are affected by these trends, as livestock are often the only source of livelihoods for the people living in these areas.

Overgrazing can be reduced by grazing fees and by removing obstacles to mobility on common property pastures. Land degradation can be limited and reversed through soil conservation methods, silvopastoralism, better management of grazing systems, limits to uncontrolled burning by pastoralists and controlled exclusion from sensitive areas. Atmosphere and climate

With rising temperatures, rising sea levels, melting icecaps and glaciers, shifting ocean currents and weather patterns, climate change is the most serious challenge facing the human race.

The livestock sector is a major player, responsible for 18 % of greenhouse gas emissions measured in CO2 equivalent. This is a higher share than transport. The livestock sector accounts for 9 % of anthropogenic CO2 emissions. The largest share of this derives from land use changes – especially deforestation – caused by expansion of pastures and arable land for feed crops. Livestock are responsible for much larger shares of some gases with far higher potential to warm the atmosphere. The sector emits 37 % of anthropogenic methane (with 23 times the global warming potential (GWP) of CO2 most of that from enteric fermentation by ruminants. It emits 65 % of nitrous oxide (with 296 times the GWP of CO2, the great majority from manure. Livestock are also responsible for almost two thirds (64%) of anthropogenic ammonia emissions, which contribute significantly to acid rain and acidification of ecosystems. This high level of emissions opens up large opportunities for climate change mitigation through livestock actions. Intensification – in terms of increased productivity both in livestock production and in feed crop agriculture – can reduce greenhouse gas emissions from deforestation and pasture degradation. In addition, restoring historical losses of soil carbon through conservation tillage, cover crops, agro-forestry and other measures could sequester up to 1.3 tonnes of carbon per hectare per year, with additional amounts available through restoration of desertified pastures. Methane emissions can be reduced through improved diets to reduce enteric fermentation, improved manure management and bio gas – which also provide renewable energy. Nitrogen emissions can be reduced through improved diets and manure management.

The Kyoto Protocol’s clean development mechanism (CDM) can be used to finance the spread of bio gas and silvo-pastoral initiatives involving afforestation and reforestation. Methodologies should be developed so that the CDM can finance other livestock-related options such as soil carbon sequestration through rehabilitation of degraded pastures.

Water

The world is moving towards increasing problems of freshwater shortage, scarcity and depletion, with 64 % of the world’s population expected to live in water-stressed basins by 2025.

The livestock sector is a key player in increasing water use, accounting for over 8 % of global human water use, mostly for the irrigation of feed crops. It is probably the largest sectoral source of water pollution, contributing to eutrophication, "dead" zones in coastal areas, degradation of coral reefs, human health problems, emergence of antibiotic resistance and many others. The major sources of pollution are from animal wastes, antibiotics and hormones, chemicals from tanneries, fertilisers and pesticides used for feed crops, and sediments from eroded pastures. Global figures are not available but in the United States, with the world’s fourth largest land area, livestock are responsible for an estimated 55 % of erosion and sediment, 37 % of pesticide use, 50 % of antibiotic use, and a third of the loads of nitrogen and phosphorus into freshwater resources. Livestock also affect the replenishment of freshwater by compacting soil, reducing infiltration, degrading the banks of watercourses, drying up floodplains and lowering water tables. Livestock’s contribution to deforestation also increases runoff and reduces dry season flows.

Water use can be reduced through improving the efficiency of irrigation systems. Livestock’s impact on erosion, sedimentation and water regulation can be addressed by measures against land degradation. Pollution can be tackled through better management of animal waste in industrial production units, better diets to improve nutrient absorption, improved manure management (including bio gas) and better use of processed manure on crop lands. Industrial livestock production should be decentralised to accessible crop lands where wastes can be recycled without overloading soils and freshwater. Policy measures that would help in reducing water use and pollution include full cost pricing of water (to cover supply costs, as well as economic and environmental externalities), regulatory frameworks for limiting inputs and scale, specifying required equipment and discharge levels, zoning regulations and taxes to discourage large scale concentrations close to cities, as well as the development of secure water rights and water markets, and participatory management of watersheds.

Bio diversity

We are in an era of unprecedented threats to Bio diversity. The loss of species is estimated to be running 50 to 500 times higher than background rates found in the fossil record. Fifteen out of 24 important ecosystem services are assessed to be in decline. Livestock now account for about 20 % of the total terrestrial animal biomass, and the 30 % of the earth’s land surface that they now preempt was once habitat for wildlife. Indeed, the livestock sector may well be the leading player in the reduction of Bio diversity, since it is the major driver of deforestation, as well as one of the leading drivers of land degradation, pollution, climate change, over-fishing, sedimentation of coastal areas and facilitation of invasions by alien species. In addition, resource conflicts with pastoralists threaten species of wild predators and also protected areas close to pastures. Meanwhile in developed regions, especially Europe, pastures had become a location of diverse long-established types of ecosystem, many of which are now threatened by pasture abandonment.

Some 306 of the 825 terrestrial eco-regions identified by the Worldwide Fund for Nature (WWF) – ranged across all biomes and all bio geographical realms, reported livestock as one of the current threats. Conservation International has identified 35 global hotshots for Bio diversity, characterised by exceptional levels of plant endemism and serious levels of habitat loss. Of these, 23 are reported to be affected by livestock production. An analysis of the authoritative World Conservation Union (IUCN) Red List of Threatened Species shows that most of the world’s threatened species are suffering habitat loss where livestock are a factor.

Since many of livestock’s threats to Bio diversity arise from their impact on the main resource sectors (climate, air and water pollution, land degradation and deforestation), major options for mitigation are detailed in those sections. There is also scope for improving pastoralists’ interactions with wildlife and parks and raising wildlife species in livestock enterprises.

Reduction of the wildlife area preempted by livestock can be achieved by intensification. Protection of wild areas, buffer zones, conservation easements, tax credits and penalties can increase the amount of land where Bio diversity conservation is prioritised. Efforts should extend more widely to integrate livestock production and producers into landscape management.

Cross-cutting policy frameworks

Certain general policy approaches cut across all the above fields. A general conclusion is that improving the resource use efficiency of livestock production can reduce environmental impacts.

While regulating about scale, inputs, wastes and so on can help, a crucial element in achieving greater efficiency is the correct pricing of natural resources such as land, water and use of waste sinks. Most frequently natural resources are free or under-priced, which leads to over exploitation and pollution. Often perverse subsidies directly encourage livestock producers to engage in environmentally damaging activities.

A top priority is to achieve prices and fees that reflect the full economic and environmental costs, including all externalities. One requirement for prices to influence behaviour is that there should be secure and if possible tradable rights to water, land, use of common land and waste sinks.

Damaging subsidies should be removed, and economic and environmental externalities should be built into prices by selective taxing of and/or fees for resource use, inputs and wastes. In some cases direct incentives may be needed.

Payment for environmental services is an important framework, especially in relation to extensive grazing systems: herders, producers and landowners can be paid for specific environmental services such as regulation of water flows, soil conservation, conservation of natural landscape and wildlife habitats, or carbon sequestration. Provision of environmental services may emerge as a major purpose of extensive grassland-based production systems.

An important general lesson is that the livestock sector has such deep and wide-ranging environmental impacts that it should rank as one of the leading focuses for environmental policy: efforts here can produce large and multiple payoffs. Indeed, as societies develop, it is likely that environmental considerations, along with human health issues, will become the dominant policy considerations for the sector.

Finally, there is an urgent need to develop suitable institutional and policy frameworks, at local, national and international levels, for the suggested changes to occur. This will require strong political commitment, and increased knowledge and awareness of the environmental risks of continuing “business as usual' and the environmental benefits of actions in the livestock sector.

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