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Contents contributed and discussions participated by davido T

davido T

Frequent Questions about Recycling and Waste Management | Municipal Solid Waste (MSW) |... - 0 views

  • In 2000, recycling resulted in an annual energy savings of at least 660 trillion BTUs, which equals the amount of energy used in 6 million households annually. In 2005, recycling is conservatively projected to save 900 trillion BTUs, equal to the annual energy use of 9 million households.
    • davido T
       
      source?
  • What effects do waste prevention and recycling have on global warming?
  • What materials are most commonly recycled in the United States through collection programs? US recycling rates for commonly recycled consumer goods in 2006 are listed below: Newspapers: 87.9% Corrugated Cardboard Boxes: 72.0% Steel Cans: 62.9% Yard Trimmings: 62.0% Aluminum Beer and Soft Drink Cans: 45.1% Magazines: 40.5% Tires: 34.9% Plastic HDPE Milk and Water Bottles: 31.0% Plastic Soft Drink Bottles: 30.9% Glass Containers: 25.3% EPA's annually updated report, Municipal Solid Waste in the US: 2006 Facts and Figures, describes the national MSW stream based on data collected since 1960. The historical perspective provided is useful for establishing trends in the types of MSW generated and the ways in which it is managed.
davido T

US EPA - High GWP Gases: Science - 0 views

  • In addition to having high global warming potentials, SF6 and PFCs have extremely long atmospheric lifetimes, resulting in their essentially irreversible accumulation in the atmosphere once emitted (see below).
  • The definition of a GWP for a particular greenhouse gas is the ratio of heat trapped by one unit mass of the greenhouse gas to that of one unit mass of CO2 over a specified time period.
  • While the most current estimates for GWPs are listed in the IPCC's Third Assessment Report (TAR), EPA analyses use the 100-year GWPs listed in the IPCC's Second Assessment Report (SAR) to be consistent with the international standards under the United Nations Framework Convention on Climate Change (UNFCCC) (IPCC, 1996
    • davido T
       
      any political reason too?? doubtful b/c ICLEI uses SAR too.
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  • Hydrofluorocarbons (HFCs) HFCs are man-made chemicals, many of which have been developed as alternatives to ozone-depleting substances (ODS) for industrial, commercial, and consumer products.
  • The global warming potentials of HFCs range from 140 (HFC-152a) to 11,700 (HFC-23).
  • The atmospheric lifetime for HFCs varies from just over a year for HFC-152a to 260 years for HFC-23.
  • Most of the commercially used HFCs have atmospheric lifetimes less than 15 years; e.g., HFC-134a, which i sused in automobile air conditioning and refrigeration, has an atmospheric life of 14 years.
  • Perfluorocarbons (PFCs) Primary aluminum production and semiconductor manufacture are the largest known man-made sources of two perfluorocarbons – CF4 (tetrafluoromethane) and C2F6 (hexafluoroethane).
  • The GWP of CF4 and C2F6 emissions is equivalent to approximately 6,500 and 9,200 tonnes, respectively. PFCs are also relatively minor substitutes for ozone-depleting substances (ODSs).
  • PFCs have extremely stable molecular structures and are largely immune to the chemical processes in the lower atmosphere that break down most atmospheric pollutants. Not until the PFCs reach the mesosphere, about 60 kilometers above Earth, do very high-energy ultraviolet rays from the sun destroy them. This removal mechanism is extremely slow and as a result PFCs accumulate in the atmosphere and remain there for several thousand years.
  • The estimated atmospheric lifetimes for CF4 and C2F6 are 50,000 and 10,000 years respectively.
  • Sulfur Hexafluoride (SF6) The global warming potential of SF6 is 23,900, making it the most potent greenhouse gas the IPCC has evaluated.
  • SF6 is used for insulation and current interruption in electric power transmission and distribution equipment, in the magnesium industry to protext molten magnesium from oxidation and potentially violent burning, in semiconductor manufacturing to create circuitry patterns on silicon wafers, and as a tracer gas for leak detection.
    • davido T
       
      semiconductors (i.e. electronics) not exactly clean-tech!
  • Like the other high GWP gases, there are very few sinks for SF6, so all man-made sources contribute directly to its accumulation in the atmosphere. Measurements of SF6 show that its global average concentration has increased by about 7% per year during the 1980s and 1990s, from less 1 ppt in 1980 to almost 4 ppt in the late 1990’s (IPCC, 2001).
  • HFC-134a has an atmospheric lifetime of about 14 years and its abundance is expected to continue to rise in line with its increasing use as a refrigerant around the world.
  • The only significant emissions of HFCs before 1990 were of the chemical HFC-23
    • davido T
       
      wow!! all since 1990
  • Between 1978 and 1995, HFC-23 concentrations have increased from 3 to 10 parts per trillion (ppt), and continue to rise. Since 1990, when it was almost undetectable, global average concentrations of HFC-134a have risen significantly to almost 10 ppt (parts per trillion).
davido T

Calculations and References | Clean Energy | US EPA - 0 views

  • In 2005, the weighted average combined fuel economy of cars and light trucks combined was 19.7 miles per gallon (FHWA 2006).
  • The average vehicle miles traveled in 2005 was 11,856 miles per year.
davido T

Special Broadcast: Past Shows - January, 2008 - 0 views

  • Thursday, January 31st, 2008KPFA brings you a day-long broadcast from the largest teach-in in US history, from the campus of San Francisco State University.
    • davido T
       
      10:10-11:00 Business and climate change Peter Melhus, Management, SFSU; Bryan Cole, Clif Bar; Wendy Pulling, PG & E; Susan Cholette, Decision Sciences, SFSU 11:10-11:55 The "Big Picture": war, capitalism and climate change 'War and Climate Change', Carlos Davidson, ENVS, SFSU; Antonia Juhasz, Institute for Policy Studies
  • Thursday, January 31st, 2008KPFA continues its day-long broadcast from the campus of San Francisco State University. Focus the Nation is the largest teach-in in US history.
    • davido T
       
      12:05-1:00 Policymaker Roundtable Wade Crowfoot, Director of Climate Protection Initiatives, Office of San Francisco Mayor Gavin Newsom; Ross Mirkarimi, San Francisco Supervisor, Dictrict 5; Bob Twomey, District Director, Office of Assemblymember Fiona Ma, 12th Assembly District; Tom Lantos, Congressman, California's 12th District 1:10-2:00 Creative responses to climate change "Serpentine," Douglas Johnson, SFSU ENVS Student; Fashion for Change, Connie Ulasewicz, Consumer & Family Studies, SFSU; Speaker of the House Nancy Pelosi live web chat with SFSU students
  • Thursday, January 31st, 2008KPFA continues its day-long broadcast from the campus of San Francisco State University. Focus the Nation is the largest teach-in in US history
    • davido T
       
      2:10-3:00 Climate change and social justice II 'Making climate solutions equitable in the U.S.', Nia Robinson, Director, Environmental Justice and Climate Change; 'Climate change and global justice', Paul Baer, EcoEquity
davido T

Despite lower carbon dioxide emissions, diesel cars may promote more global warming tha... - 0 views

  • The state of California is implementing an even more restrictive standard in 2004, allowing only 0.006 grams per kilometer [0.01 grams per mile] of particulate emissions.
  • Even if the California standard were introduced worldwide, says Jacobson, diesel cars may still warm the climate more than gasoline cars over 13 to 54 years.
  • Jacobson says that new particle traps being introduced by some European automobile manufacturers in their diesel cars appear to reduce black carbon emissions to 0.003 grams per kilometer [0.005 grams per mile], even below the California standard.
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  • But, he says, "diesel vehicles emitting at this level may still warm the climate more than gasoline over a 10 to 50 year period, not only because of black carbon emissions, but also because the traps themselves require addition fuel use.
  • Gasoline/battery hybrid vehicles now available not only get better mileage than the newest diesels but also emit less black carbon."
  • In practice, less than 0.1 percent of light vehicles in the United States run on diesel fuel, whereas more than 25 percent do in Europe. (Almost a third of new European cars in 2000 were diesel powered.)
  • In both the United States and Europe, virtually all heavy trucks and buses are diesel powered, and American diesel consumption rates for all modes of ground transportation combined are about 75 to 80 percent of those in Europe.
    • davido T
       
      source?
davido T

GHG Protocol Initiative - 0 views

  • a decade-long partnership between the World Resources Institute and the World Business Council for Sustainable Development
  • Designing a Customized Greenhouse Gas Calculation Tool
    • davido T
       
      go back to this; downloaded the pdf (44pgs)
    • davido T
       
      Table of Contents Chapter 1 Introduction 2 Chapter 2 E lements of an Entity-Level Calculation Tool 6 Chapter 3 Deciding which Tool Elements to Customize 9 Chapter 4 Customizing the GHG Accounting Concepts 16 Chapter 5 E stimating or Measuring Emissions 20 Chapter 6 Designing a Comprehensive Stakeholder Process 28 Chapter 7 Launching the Customized Calculation Tool 31
  • The GHG Protocol provides the accounting framework for nearly every GHG standard and program in the world - from the International Standards Organization to the EU Emissions Trading Scheme to the California Climate Registry - as well as hundreds of GHG inventories prepared by individual companies.
davido T

Democracy Now! | Carbon Trading: Practical Solution to Global Warming or Corporate Gree... - 0 views

  • Despite the US government’s opposition to the Kyoto Protocol, California, New York and New Jersey embraced carbon trading Tuesday as they joined European governments, Canadian provinces, and New Zealand to launch a forum known as the International Carbon Action Partnership.
davido T

Saving For The Future, Seed By Seed, Seed Banks Helping Protect Rare And Endangered Pla... - 0 views

  • Many plants have been the source for medicine that cures disease. Take the rosy periwinkle, which is native to Madigascar. Before its properties were discovered, only 10 percent of children with leukemia lived. But from the plant, scientists created a compound that helped increase the survival rate. "With the compound, the rate has now gone up to 95 percent,” Raven says. “Who knows what else is out there in nature's pharmacy.”
    • davido T
       
      "nature's pharmacy"--the only reason to save species?? (well, the most marketable b/c most clearly communicatable anthro-benefit)
  • "We will have 10 percent of the world’s seeds by 2010 and we would like to go on and have a quarter of the world’s species by 2020,” says Paul Smith, director of the Millennium Seed Bank Project.
  • One in six of all wild plants are used for medicine. One in 10 are used for food, especially in developing countries.
davido T

Waste Home - Life-Cycle of Waste Image and Description | Climate Change - What You Can ... - 0 views

  • Landfilling, the most common waste management practice, results in the release of methane from the anaerobic decomposition of organic materials. Methane is 21 times more potent a GHG than carbon dioxide. However, landfill methane is also a source of energy, and some landfills capture and use it for energy. In addition, many materials in landfills do not decompose fully, and the carbon that remains is sequestered in the landfill and not released into the atmosphere.
  • The image above illustrates the four main stages of product life-cycles, all of which provide opportunities for GHG emissions and/or offsets. These stages are: raw material acquisition, manufacturing, recycling, and waste management.
davido T

U.S. Climate Emergency Council - Home - 0 views

  • Those who profess to favor freedom, and yet deprecate agitation, are those who want crops without plowing up the ground. They want rain without thunder and lightning. They want the ocean without the awful roar of its waters. This struggle may be a moral one; or it may be a physical one; or it may be both moral and physical; but it must be a struggle. Power concedes nothing without a demand. It never did, and it never will.                                                                                                                         --Frederick Douglass 1857
  • on September 4th, give up food for a day, And Send a powerful message on global warming.
  • Register for the fast>> Find a faster near you>> ESSAY: No Time for Activism as Usual>>
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  • Coal-to-Liquid is a Giant Leap Backwards UPDATE: On June 19th, the Senate rejected an amendment by Sen. Bunning that would have mandated a 6 billion gallon market by 2022 for liquid coal with a vote of 39-55. Also on June 19th, the Senate rejected an amendment led by Sen. Tester that would have provided $10 billion in loan guarantees for the development of liquid coal in a vote of 33-61.
  • In an editorial on June 14, the Washington Post called the coal-to-liquid movement a "sop to the coal industry that would pump more greenhouse gases into the atmosphere. That is not the way to go."
davido T

Global Footprint Network - Idealist.org - Imagine. Connect. Act. - 0 views

  • Last day to apply: June 11, 2007
    • davido T
       
      i applied to this same position once, didn't hear a thing back!
  • The successful candidate will have the solid quantitative and software skills needed to manage and conduct Ecological Footprint assessment projects, such as the Footprint of business operations, and to develop Footprint modeling applications, such as calculators, for both stand-alone and web-based platforms
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  • Intermediate to advanced Excel programming skills
  • Experience with Visual Basic and database queries / administration (MySQL, MS Access), or demonstrated ability to learn quickly
  • Additional Qualifications: Excel Quantitative Analysis Skills Number Analysis and Crunching
davido T

The Thirteenth Tipping Point | Mother Jones - 0 views

  • The 12 tipping points are: 1. Amazon Rainforest 2. North Atlantic Current 3. Greenland Ice Sheet 4. Ozone Hole 5. Antarctic Circumpolar Current 6. Sahara Desert 7. Tibetan Plateau 8. Asian Monsoon 9. Methane Clathrates 10. Salinity Valves 11. El Nino 12. West Antarctic Ice Sheet
  • A 2005 study by Anthony Leiserowitz, published in Risk Analysis, found that while most Americans are moderately concerned about global warming, the majority—68 percent—believe the greatest threats are to people far away or to nonhuman nature. Only 13 percent perceive any real risk to themselves, their families, or their communities. As Leiserowitz points out, this perception is critical, since Americans constitute only 5 percent of the global population yet produce nearly 25 percent of the global carbon dioxide emissions.
  • 12 ASTEROIDS AND EVOLVING INTO WISDOM IN 2004, JOHN SCHELLNHUBER, distinguished science adviser at the Tyndall Centre for Climate Change Research in the United Kingdom, identified 12 global-warming tipping points, any one of which, if triggered, will likely initiate sudden, catastrophic changes across the planet. Odds are you've never heard of most of these tipping points, even though your entire genetic legacy—your children, your grandchildren, and beyond—may survive or not depending on their status.
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  • EISEROWITZ'S STUDY OF risk perception found that Americans fall into "interpretive communities"—cliques, if you will, sharing similar demographics, risk perceptions, and worldviews.
    • davido T
       
      that's a great term "interpretive communities"
    • davido T
       
      stopped reading here
  • On one end of this spectrum are the naysayers: those who perceive climate change as a very low or nonexistent danger. Leiserowitz found naysayers to be "predominantly white, male, Republican, politically conservative, holding pro-individualism, pro-hierarchism, and anti-egalitarian worldviews, anti-environmental attitudes, distrustful of most institutions, highly religious, and to rely on radio as their main source of news."
  • This group presented five rationales for rejecting danger: belief that global warming is natural; belief that it's media/environmentalist hype; distrust of science; flat denial; and conspiracy theories, including the belief that researchers create data to ensure job security
  • We might wonder how these naysayers, who represent only 7 percent of Americans yet control much of our government, got to be the way they are. A study of urban American adults by Nancy Wells and Kristi Lekies of Cornell University sheds some light on environmental attitudes. Wells and Lekies found that children who play unsupervised in the wild before the age of 11 develop strong environmental ethics. Children exposed only to structured hierarchical play in the wild—through, for example, Boy Scouts and Girl Scouts, or by hunting or fishing alongside supervising adults—do not. To interact humbly with nature we need to be free and undomesticated in it. Otherwise, we succumb to hubris in maturity. The fact that few children enjoy free rein outdoors anymore bodes poorly for our future decision-makers.
    • davido T
       
      hmm... was it so clear-cut a conclusion?
  • THE ALARMISTS AND THE ACROBAT ON THE OTHER END of Leiserowitz's spectrum of perception regarding global warming is an interpretive community he calls the alarmists, generally comprised of individuals holding pro-egalitarian, anti-individualist, and antihierarchical worldviews, who are supportive of government policies to mitigate climate change, even so far as raising taxes. Members of this group are likely to have taken personal action to reduce greenhouse gas emissions.
  • Collectively, alarmists compose 11 percent of Americans, with the remaining interpretive communities falling considerably closer to the alarmists than the naysayers in the spectrum—suggesting the gap might be cinched by sustained public education on the neighborhood dangers likely to arise in a changed global climate.
  • Hurricane Katrina provided a wake-up call for how bad it can get in the neighborhood, and may prove a tipping point itself.
  • Yet long before its rampage, American kids were coloring pictures of the first icon of global environmentalism, the Amazon. Its billion-plus acres of rivers and rainforest—its trees collecting and containing excessive greenhouse gases from the atmosphere—were our primer for the revolutionary notion that the earth's neighborhoods are interdependent. Today Amazonia is the most famous of Schellnhuber's tipping points. For a generation, kids have grown up learning that the Amazon is at risk from massive deforestation. But even if clearcutting were to halt, climate models forecast that a warming globe will convert the wet Amazonia forest into savanna within this century, and the loss of trees will render the region a net CO2 producer, further accelerating global warming.
davido T

Green Fleets Home Page - 0 views

  • Also, every gallon of gasoline or diesel fuel burned releases about 22 pounds of carbon dioxide (CO2), the major pollutant causing global warming.
    • davido T
       
      how is that possible when a gallon of gas doesn't even weigh 22 lbs??
davido T

Green Streets: Hall of Fame - July/August 2006 - Sierra Magazine - Sierra Club - 0 views

  • The Second City's green-roofs program is second to none, with more than 2.5 million square feet devoted to providing cooling and insulating cover.
  • CHICAGO population 2,862,244
  • The first major city to tackle global warming, Portland creates less greenhouse gases than it did 15 years ago, while saving $2 million annually on city energy bills--and attracting new business with its efficiency expertise.
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  • Its green-building standards are the toughest in the nation.
  • PORTLAND, OREGON population 533,492
  • San Francisco proves its worthiness with progressive purchasing policies (including phasing out toxic products and those from sweatshops)
  • $100 million invested in solar power
  • and an innovative study of the potential for generating renewable energy from the waves off its shores.
  • The city's acclaimed recycling program also contributes to its top-notch culinary reputation by sending compost made of food scraps to the region's famed vineyards and farms.
  • SAN FRANCISCO population 744,230
  • Mayor Greg Nickels (D) brought Seattle into the national spotlight when he launched the U.S. Mayors Climate Protection Agreement to reduce global-warming pollution nationwide.
  • The city government is retrofitting its heavy-duty diesel vehicles with devices that will cut particulate pollution in half
  • By investing in renewable energy and efficiency programs to offset its contributions to global warming, the city-owned utility has become the first in the country to reduce its net greenhouse-gas emissions to zero.
davido T

"Life on the Ethanol-Guzzling Prairie" - NY Times 2007-02-11 - 0 views

  • What is happening here is a vision that many in rural America see as their salvation: high-performance moonshine from amber fields of grain, and a “grass station” in every town. It may be a chimera. It may drain precious water from the arid plains and produce less energy that it uses. But it has the undeniable power of an idea in ascendancy.
  • The vision of a decentralized ethanol industry is taking shape, albeit an industry aided by tax breaks and government mandates. There are now 113 American ethanol plants and an additional 77 under construction, according to the Renewable Fuels Association, the industry trade group. Most of them are right in the middle of the Farm Belt, in counties that have been losing people since the Depression.
  • Archer Daniels Midland, once the dominant force, is less of a player, controlling about 22 percent of the market. But roughly 40 percent of the new biorefineries are locally owned, representing the sweat and capital of farmers, retired schoolteachers and small-town bankers.
davido T

8 technologies to save the world | 2 | Business 2.0 - 0 views

  • Call it the networked environment. Picture tiny - we're talking small as a dime - wireless sensors lining lake beds and ocean floors, buried in the ground, and floating in the sky. All the time they are sniffing the air, water, and soil for pollutants and detecting changes in temperature and pressure.
  • The payoff: real-time data on a variety of phenomena that affect the economy and society - climate change, hurricanes, air and water pollution.
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