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Sustainable vs Sustained Based on a presentation to York Mills Eco-day, November 17, 2011 Tim Heffernan

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Sustainable vs Sustained. Based on a presentation to York Mills Eco-day, November 17, 2011 Tim Heffernan. Easter Island: Multiple Lessons. Easter Island was annexed by Chile in 1888. It lies 3510 km west of the Chilean mainland. Easter Day in 1722. - PowerPoint PPT Presentation

TRANSCRIPT

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Sustainable vs Sustained

Based on a presentation to York Mills Eco-day, November 17, 2011

Tim Heffernan

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Easter Island: Multiple Lessons

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Easter Island was annexed by Chile in 1888. It lies 3510 km west of the Chilean mainland.

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Easter Day in 1722

Imagine what the first Dutch explorers thought when they first accidentally sailed to Rapa Nui (Easter Island) and saw the statues.

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Statistics Rapa Nui (Easter Island)is 5 hours (3600

km) by jet airplane from Chile (2000km from the closest inhabited island).

The island is triangular and about 20 kilometers long. (27°S)

Some statues weigh over 100 tons (the largest were close to 10 meters high).

Hundreds (887) of statues all around the island.

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How did it fall apart? There is clear evidence that Easter

Island once was a heavily populated (perhaps 20,000 people) and rich society.

There is clear evidence that this big population collapsed and most of the population died.

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Collapse (cont’d)

When the Europeans first arrived in 1722, there were approx 2,500 natives.

In 1877 there were only 110.

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Collapse (cont’d) Natives came originally from Polynesia

-probably accidentally found Rapa Nui (Easter Island) while they were lost.

Statues were built by natives cut from soft volcanic stone on the island.

Society collapsed before the Europeans arrived caused by overpopulation and poor use of resources

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Collapse

Rapa Nui (Easter Island)must have seemed like paradise to the first natives of perhaps 100 people.ForestsSeafoodPlenty of space

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Reasons for collapse

Cults formed and statues were built to worship the cults.

Many trees were cut down in order to move the statues

(log rolling – compare to Stonehenge)

Rats ate the seeds leaving the island without trees

Boats slowly disappeared so people could no longer fish.

The soil washed into the sea because there were no trees.

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How do we know this?

Pollen in soil samples can show how plant life

changes over time.

Bones of animals show that less and less fish was

eaten as time advanced.

Bones of humans show evidence of cannibalism.

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Attenborough youtube: 4min 25 sec into clip

  http://www.youtube.com/watch?v=

-hO-vCPuuQQ

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Why? What?

• Why didn't they stop before it was too late?

• What were they thinking when they cut down the last tree?

• What can WE learn from the history of Easter Island?

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Larger Lesson

What larger lesson can we learn about the planet Earth based on Easter Island’s history?

Make a list of the similarities as follows: Both Rapa Nui and the Earth:

1. 2. 3. 4.

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Eco-lesson

Both Rapa Nui and the Earth: 1. are isolated with nowhere to

escape to; 2. have experienced environmental

destruction; 3. have overpopulation problems; 4. are quickly using up resources

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End of Line DVD (segment 2)

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Decline in fish stocks in North Atlantic over 150 years

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Decline of Biomass to feed the fish over the last 100years

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Especially if accompanied by exponential consumption of finite resources...

Is it as “simple” as making rules for population (One family, One child) or limiting food?

Do we need to move from a period of growth to a period of non-growth?

If human population is growing exponentially, and resources are finite, how do we get by?

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Growth must be permanentBigger, better, faster, more

Growth must occur for society to prosper. Consumers, workers, corporations, all want more

Current cultural paradigm – sustained growth

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New paradigm? Sustainability

Sustainable growth vs

Sustained growth

Is zero or negative growth OK? Can it be sold to people?

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Sustainabity defined

derived from the Latin sustinere (tenere, to hold; sus, up).

the most widely quoted definition of sustainability and sustainable development, that of the Brundtland Commission of the United Nations on March 20, 1987…….

“sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs”

http://www.youtube.com/watch?v=B5NiTN0chj0&feature=related (animation on sustainability)

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Handout worksheet “Areas of Sustainability”

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Greenwashing

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http://www.youtube.com/watch?v=scqZT8SgGws

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Environmentalism: 1960’s, Greenpeace Single issue politics Putting the environment first, above all else

Sustainability Broader scope, it attracts more people Incorporates a wider range of issues and movements Balance of social, economic, AND environmental

needs

Environmentalism vs. Sustainability

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China’s environmental crises

China has averaged an economic growth of 8% over the past 20 years

Has increased the standard of living for hundreds of millions of Chinese citizens

This economic growth has also had severe ramifications for the natural environment

Dramatic increase in demand for natural resources Forest resources have been depleted Levels of water and air pollution have skyrocketed Caused by poorly regulated industrial and household

emissions and waste

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8 of the 10 most polluted cities in the world are now located in China

In 1995, ambient concentrations of SO2 in over half of 88 Chinese cities monitored exceeded WHO guidelines for safety

China’s overwhelming reliance on coal for its energy needs has made its air quality among the worst in the world

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In many cities the concentrations were 2-5 times the safety levels given by WHO guidelines

The % of arable land affected by acid rain increased from 18% to 40% between 1985 and 1998

China now releases 13% of global CO2 emissions

2nd only to the United States (23%)

85 of 87 cities exceeded WHO guidelines for total

suspended particulate matter

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Industrial and household demand has risen more than 80% since 1980

About 60 million people find it difficult to get enough water for their daily needs

In several water-scarce regions in northern and western China, factories have been forced to close down because of lack of water

In addition, water pollution is posing a serious and growing threat to water reserves

Economic development has also impinged on

China’s already scarce water resources

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Demand for furniture, chopsticks, and paper has driven an increasingly profitable, but environmentally devastating, illegal logging trade.

By the mid-1990s, half of China’s forest bureaux reported that trees were being felled at an unsustainable rate. 20% had already exhausted their reserves

China’s forest resources rank among the lowest

in the world

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loss of biodiversity

climate change

soil erosion

The result of China’s increasing demand on its forest

resources

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an increase in devastating sandstorms

and desertification

More than ¼ of China’s territory is now desert

Desertification is advancing at a rate of roughly 900 sq. miles annually

Deforestation, overgrazing and over-cultivation of

cropland, has also contributed to:

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Mineral Resources: how long will they last?

•Silver (for catalytic converters on cars)9 yrs

•Uranium (nuclear power stations) 19 yrs

•Tantalum (mobile phones/camera lenses) 20 yrs

•Copper (cable wire) 38 yrs

And the biggie…………

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PEAK MINERALS

http://www.science.org.au/nova/newscientist/ns_diagrams/027ns_005image2.jpg

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• aluminum is the most abundant metal on earth.

• Over 50 percent of the aluminum cans produced are recycled.

• A used aluminum can is recycled and back on the grocery shelf as a new

can, in as little as 60 days.

• Aluminum is a durable and sustainable metal: two-thirds of the

aluminum ever produced is in use today.

• Every minute of everyday, an average of 113,204 aluminum cans are

recycled.

• Making new aluminum cans from used cans takes 95 percent less energy

and 20 recycled cans can be made with the energy needed to produce

one can using virgin ore.

Aluminum facts (from various eco websites)

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• Recycling one aluminum can saves enough energy to keep a 100-watt bulb

burning for almost four hours or run your television for three hours.

• Last year 54 billion cans were recycled saving energy equivalent to 15 million

barrels of crude oil – America’s entire gas consumption for one day.

• Tossing away an aluminum can wastes as much energy as pouring out half of that

can’s volume of gasoline.

• In 1972, 24,000 metric tons of aluminum used beverage containers (UBCs) were

recycled. In 1998, the amount increased to over 879,000 metric tons.

• In 1972, it took about 22 empty, aluminum cans to weigh one pound. Due to

advanced technology to use less material and increase durability of aluminum

cans, in 2002 it takes about 34 empty aluminum cans to weigh one pound.

• The average employee consumes 2.5 beverages a day while at work.

• The empty aluminum can is worth about 1 cent

Aluminum facts , contd.

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Had the 50.7 billion cans wasted in 2001 been recycled, they could have saved the

energy equivalent of 16 million barrels of crude oil--enough energy to generate

electricity for 2.7 million U.S. homes for a year.

Had the 50.7 billion cans wasted in 2001 been recycled, they would have:

• Avoided the emission of more than three million tons of greenhouse gases

• Avoided the emission of 75,000 tons of sulfur dioxide and nitrogen oxide

emissions— contributors to smog and acid rain;

•Reduced soil erosion and habitat loss from strip mining for bauxite and coal;

• Reduced toxic runoff from mining which contaminates soil and waterways;

• Reduced solid wastes and liquid effluents from smelting and other industrial

processes;

• Reduced damage to salmon habitats in the Pacific Northwest and Canada; and

• Avoided landfilling, littering or incinerating 760,000 tons of aluminum.

What they didn’t say (from Trashed Cans – The Global Environmental Impacts of Aluminum Can Wasting in America, 2002)

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