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SUSTAINABILITY. A level of resource use that maximizes long-term yield and avoids over-exploitation (Faustmann 1968, probably original meaning). SUSTAINABILITY.
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SUSTAINABILITY A level of resource use that maximizes long-term yield and avoids over-exploitation (Faustmann 1968, probably original meaning).
SUSTAINABILITY Sustainable development meets the needs of the present without compromising the ability of future generations to meet their needs (UN Brundtland World Commission on Environment and Development, 1987).
SUSTAINABILITY Sustainable development is adaptive, interdisciplinary, responsive to the needs of the community, and fosters system resiliency (sensu Holling 1993).
Sustainable development is the official policy of many government agencies, non-profit organizations, or private firms: In the USDA Mission statement: “… ensures the health of the land through sustainable management. Its agencies work to prevent damage to natural resources and the environment, restore the resource base, and promote good land management. “ USGS Sustainable Water Resources Roundtable “Serve as a forum to share information and perspectives that will promote better decision making in the U.S. regarding the sustainable development of our nation's water resources.” National Park Service’s Guiding Principles of Sustainable Design “… is intended to direct park management philosophy. Its goal is to provide a basis for achieving sustainability in facility planning and design, emphasize the importance of biodiversity, and encourage responsible decisions.”
Ministry for the Environment, N.Z. We work with others in central and local government, industry and the community to achieve good environmental governance and decision-making at all levels. Sustainable development is the context for all our work. In the draft constitution of the European Union: The Union shall work for the sustainable development of Europe based on balanced economic growth, a social market economy, highly competitive and aiming at full employment and social progress, and with a high level of protection and improvement of the quality of the environment. UN Department of Sustainable Development … promotes sustainable development … through technical cooperation and capacity building at international, regional and national levels. Toyota We, TOYOTA MOTOR CORPORATION and our subsidiaries, take initiative to contribute to harmonious and sustainable development of society and the earth, based on our Guiding Principles.
Three arguments against the sustainability paradigm (Ludwig 1993) • Natural resources are usually not harvested in a controlled way (principle of human greed). • Even if we are willing to harvest at safe rates, we don’t know how. • Even if we figure out how to harvest at sustainable levels, population growth will make harvest rates inadequate. • - natural resources are finite • - demand on resources keeps growing • - environmental change outside of local control
How to achieve sustainability? Technical solutions? Better humans? Better laws and enforcement? Better science?
Step One: Know your ecological impact. Find out about the consequences of your actions and make well-informed decisions.
The price of eating meat (according to a report by the Harvard Medical School) • Livestock production • uses 2/3 of the world’s productive agricultural land. • contributes with 22% to global methane emissions. • degrades the land (often irreversibly) and pollutes the water. • Exaggerated meat consumption has • been linked to: • heart disease • diabetes • obesity • food poisoning • some forms of cancer Every day, 40,000 people die from hunger.
Catching Canadian Cod: The traditional way The industrial way:
“BY-CATCH” Gulf of Mexico 74% bycatch 26% shrimp South Atlantic 82% bycatch 18% shrimp
Healthy ocean bottom Stripped ocean bottom
Environmental Pollution • Most common pollutants: • greenhouse gases • nitrate of other nitrogen-rich wastes • SO2 and NOx causing acid rain • pesticides • nuclear radiation • heavy metals from mining and industry
Brominated Fire Retardants (PBDEs): • Used in many common household products (electronics equipment, lighting, wiring, building materials, textiles, furniture, industrial paints) to reduce fire hazard. • According to the EPA, there is growing evidence that PBDEs persist in the environment and accumulate in living organisms. • Testing indicates that these substances can cause liver and thyroid toxicity as well as neurodevelopmental damage. • Traces have been detected in humans and wildlife. • Some European countries banned PBDEs following the precautionary principle.
Ammonium Perchlorate • Primary component of solid propellant for rockets, missiles, fireworks, or explosives in various military munitions and air bag inflators. • Perchlorate can affect the thyroid gland's ability to make essential hormones in fetuses, infants and children. Can cause lowered IQ, mental retardation, loss of hearing and speech, and motor skill deficits. EPA recommends that exposure to the chemical should not exceed 1 part per billion (ppb) Average concentration of perchlorate in milk was 5.76 ppb >38% of the samples exceeded 6.0 ppb IN LETTUCE: average concentration was 10.49 ppb
Recommended websites: World Wildlife Fund Household Toxins Institute Toxtown
The “Ecological Footprint” concept. Conceived in 1990 by Mathis Wackernagel and William Rees at the University of British Columbia, the Ecological Footprint is used as a common currency for measuring consumption, in terms of land (and ocean) requirements for producing goods and services. It is now in wide use by scientists, businesses, governments, agencies, individuals, and institutions working to monitor ecological resource use and advance sustainable development.
Crop Consumption (t/yr) Crop Yield (t/ha/yr) Required Crop Area (ha) : = Required Land for reforestation (ha) CO2 emmission (t/yr) Fraction not absorbed by oceans Terrestrial Sequestration Rate (tons/ha/yr) : x = Ecological footprint: is the amount of LAND AREA a human population would hypothetically need to provide the resources required to support itself and to absorb its wastes.
Example: Italy (ca. 56 mio people) Category Yield Consumption Footprint component (ha/person) Beef 33 kg/ha 1,571,477 t 0.8377 pasture Dairy 502 kg/ha 14,975,877 t 0.5219 pasture Cereals 2744 kg/ha 26,087,912 t 0.1664 arable land Timber 1.99 kg/ha 28,794,478 t 0.2533 forest Liquid fossil fuel 71 GJ/ha/yr 57 GJ/yr/person 0.8071 “fossil energy” land (Wackernagel et al. 1999) Global footprint of Italy: 4.2 ha per person Available: 1.3 ha per person Global available average: 2 ha/person (no wild land set aside) 1.8 ha/person (12% reserved for non-use)
Germany Per-person resource demand (Ecological Footprint) and resource supply (Biocapacity) in Germany since 1961. Biocapacity varies each year with ecosystem management, agricultural practices (such as fertilizer use and irrigation), ecosystem degradation, and weather.
Niger more
Ecological footprint of a “Redneck”: Ecological footprint of a “Treehugger”: Footprint (acres) FOOD MOBILITY SHELTER GOODS/SERVICES TOTAL FOOTPRINT Footprint (acres) FOOD MOBILITY SHELTER GOODS/SERVICES TOTAL FOOTPRINT
The Millenium Ecosystem Assessment Group’s bottom line: • We are spending Earth’s natural capital, putting such strain on the natural functions of Earth that the ability of the planet’s ecosystems to sustain future generations can no longer be taken for granted. • At the same time, the assessment shows that the future really is in our hands. We can reverse the degradation of many ecosystem services over the next 50 years, but the changes in policy and practice required are substantial and not currently underway.
