Category: Archive

Archived material from historical editions of The Generator

  • Lovins reveals alternative oil plan

    Energy guru Amory Lovins lays out his plan for weaning the US off oil and revitalizing the economy in the process at the Technology, Entertainment and Design conference in Monterey, California. It’s the subject of his book Winning the Oil Endgame, and he makes it sound fairly simple: On one hand, the deadly risks of continued dependency, and on the other, some win-win solutions.

    The basis of his approach is that peak oil and climate change are engineering problems, not moral ones and that we simply need to think hard to come up with solutions. One of his most accessible solutions is to reduce the weight of automobiles by more than half. Currently most cars weigh at least ten times the human that drives them. This means that ninety percent of the energy they consume is used to drive the car, not the passenger around. 

  • Cell death may keep us young

    As the American population grows older, questions regarding the aging process and how it can be positively influenced are increasingly becoming the focus of scientific research and public interest. The age-related accumulation of proteins and lipids damaged by chemically aggressive forms of oxygen is considered by most in the geriatrics field to be a normal part of the aging process. As a result in most age-associated diseases, such as Alzheimer’s, damaged proteins accumulate in excessive amounts, which leads to progressive cell death in the brain.

    All cells undergo autophagy — literally self-eating, — which requires the assembly of specialized vesicles called autophagosomes. These vesicles surround or engulf damaged cellular proteins or structures and then traffic the "bagged garbage" to a second group of vesicles, which disposes of the trash with the help of digestive enzymes. This process can be enhanced when animals are placed on a calorie-restricted diet, a regime known to extend lifespan.

    "The activation of autophagy facilitates the removal of damaged molecules that accumulate during cellular aging," says Finley. "This may be particularly important in the nervous system since neurons produce damaged molecules at a much higher rate than most cell types." Keeping cells free of damaged molecules is critical for neurons because unlike many cells, they do not divide or replace themselves once created at birth. "They rely on autophagy together with other clearance and detoxification pathways to keep themselves healthy and functioning for decades," explains Finley.

    For their studies, the Salk researchers turned to the fruit fly Drosophila, a powerful model organism, whose genetics can easily be manipulated. When initial experiments indicated that the expression of several autophagy genes decreased over the normal lifespan of fruit flies, the Salk researchers focused on one particular protein, Atg8a. This protein is an essential component needed for the formation of new autophagosomes. Finley and her team found that levels of Atg8a were significantly reduced by four weeks of age, a time when the flies are considered middle aged. At the same time, protein aggregates were not efficiently cleared by the cellular clean-up crew and started to accumulate.

    Without Atg8a, things went from bad to worse. Damaged proteins tagged for degradation started to pile up early and life expectancy plummeted. "The abnormal accumulation of protein aggregates had striking similarities to those seen in the most common human neurodegenerative diseases," says first author Anne Simonsen, Ph.D., a visiting scientist from the University of Oslo, Norway.

    When the researchers kept the neuronal levels of Atg8a high, the genetically engineered flies were spared the ravages of time. Promoting the pathway not only prevented the accumulation of protein aggregates but also significantly extended the average lifespan. "Our experiments show for the first time genetically that autophagy can sequester and eliminate misfolded and damaged proteins, which accumulate in neurons as normal part of the aging process," says Simonsen, "but most importantly they demonstrate that enhancing the clearance of damaged proteins and protein aggregates increases longevity."

    Insulin signaling and caloric restriction are two major determinants of longevity and they also impact the activity level of autophagy. Therefore, regulating autophagy, the pathway that directly does the cleanup work, may be the key factor in controlling the aging process, the researchers say. "By maintaining the expression of a rate-limiting autophagy gene in the aging nervous system there is a dramatic extension of lifespan and resistance to age-associated oxidative stress," says Finley.

    Researchers who also contributed to the study include post-doctoral researcher and co-first author Robert C. Cumming, formerly in the Cellular Neurobiology Laboratory at the Salk Institute and now at the University of Western Ontario, Canada, and researchers Andreas Brech, Ph.D., and Pauline Isakson, Ph.D., both at the University of Oslo, Norway, and professor David R. Schubert in the Cellular Neurobiology Laboratory.

  • The Return of the Bread Riot

    Italy is not the only country experiencing growing political turbulence over the cost of staple foods. Last January, 70,000 people marched through the streets of Mexico City in a protest that has become known as the "tortilla riot." In response to these demonstrations, president Felipe Calderon signed an agreement to stabilize tortilla prices, which have skyrocketed more than 700% since 1994, the year that the North American Free Trade Agreement became law. After NAFTA took effect, many Mexican peasants were pushed off their land as cheap U.S. corn flooded the now tariff-free domestic market. Now that many American farmers are turning over significant portions of their corn harvest to the production of ethanol, Mexican consumers have no hedge against rising international corn prices.

    Where are such apparently isolated protests leading? It might be useful to get some historical perspective by considering one of the world’s most famous bread riots. On the morning of October 5th, 1789, a small girl began banging a drum and chanting a protest in one of Paris’s markets. According to the historian George Rudé, this protest quickly drew a large crowd of sympathetic women, who set out together on a march to make their complaint heard to the royal household in Versailles. Their numbers grew quickly to six or seven thousand; as they marched, the town guards were disarmed and their weapons were handed to men who followed the crowd of enraged women through the streets. We all know where this protest led ultimately.

    Yet the march on Versailles, like the storming of the Bastille earlier that year, was motivated not by anger over the conspicuous consumption of royals like Marie Antoinette, but rather by the far more immediate issue of the cost of bread. A laboring family of four in Paris ate 1.2 tons of grain a year in this period, 80 percent of which had to get to the city from the surrounding Paris basin on a poorly maintained road network. In the 1780s a series of floods in this area led to poor harvests, provoking soaring bread prices. By 1789, a worker’s daily bread took nearly 90 percent of her or his income. The demand for bread was central to practically all the journées, the popular insurrections and demonstrations that broke out repeatedly in Paris between 1789 and 1795. Women, on whose shoulders the crushing burden of domestic economy rested, were pivotal catalysts and participants in these demonstrations.

    Of course, nothing like this could happen today, right? The past decade and a half has seen a global wave of democratization, a vital hedge against famine according to the economist Amartya Sen. In addition, we’re blessed with a highly flexible food production and distribution system, the product not simply of a few decades of globalization but also of the thoroughgoing transformation of agriculture wrought by the Green Revolution following the 1950s. There are signs, however, that the energy-intensive practices of industrial agriculture spread around the world by the Green Revolution are not sustainable. As Michael Pollan recently argued in the New York Times, the mysterious disappearance of bees over the last year and the growth of drug-resistant Staphylococcus bacteria (which is now killing more Americans each year than AIDS) are both signs of the precariousness of the vast monocultures on which our current food system is based. According to Pollan, "whenever we try to rearrange natural systems along the lines of a machine or a factory, whether by raising too many pigs in one place or too many almond trees, whatever we may gain in industrial efficiency, we sacrifice in biological resilience."

    As important as these symptoms of a brewing crisis are, however, one doesn’t have to go as far as a hospital ward or an almond grove to get a sense of the unsustainability of the global agricultural system. A trip to the local supermarket to buy pasta will suffice. The rising cereal prices that drew protests in Italy and Mexico this year are the concrete harbingers of a calamity in the making. Over the last year, the food price index of the United Nations’ Food and Agriculture Organization rose by more than 40 percent, adding to a significant increase of 9 percent in 2006. According to the head of the FAO, Jacques Diouf, prices of wheat and oilseeds are at record highs; wheat prices have risen by $130 a ton, or 52 percent, since a year ago. In tandem with this inflation in the cost of staple cereals, reserves have become severely depleted. World wheat stores declined 11 percent this year, to the lowest level since 1980. That corresponds with 12 weeks of the world’s total consumption. There are only 8 weeks of corn left.

    Joachim von Braun, the head of the International Food Policy Research Institute, recently pointed out that crises have not materialized despite these dwindling supplies because states have literally eaten into their national grain stocks. According to von Braun, this situation may change soon because China, in particular, has nearly exhausted its supplies. In a speech in Beijing, von Braun stated that "over the next 12 to 24 months we are in a fairly risky situation. Large consuming nations, particularly China, will feel pressed to enter international markets to bid up prices to unusual levels." Chinese consumers are already facing galloping food inflation. According to a local paper quoted by the Manchester Guardian, three shoppers died recently in a stampede at a supermarket that was offering discounted rapeseed oil. With its massive foreign exchange reserves, China could potentially buy the global food crop many times over, driving international commodity prices through the roof.

    Just as was true in late-eighteenth century Paris, rising food prices are also related to climatic conditions. The early ­ and still relatively mild ­ effects of global warming have seriously damaged crop yields in breadbasket regions such as Australia and Ukraine in recent years. As S. Mark Howden of Australia’s Commonwealth Scientific and Industrial Research organization pointed out recently, "If there’s a significant change in climate in one of our high production areas, if there is a disease that affects a major crop, we are in a very risky situation."

    And, just as in the days of the French Revolution, it is the poor who will suffer the most from the spiraling cost of food. International aid agencies are having trouble keeping up with their shipments of food not just as a result of the inflated price of basic foodstuffs, but also because it has become far more expensive to transport food around the world given the surging value of petroleum. High oil prices also directly affect agriculture and, with it, food stocks, because petroleum is a vital ingredient of both fertilizers and pesticides, as well, of course, as being necessary to run the tractors and diesel pumps that are essential to industrial agriculture the world over. In addition, the threat of climate change is affecting poor countries in another way: as bio-fuels have been embraced as an important alternative to petroleum, food and fuel have entered into direct competition. According to a recent article in the Guardian, for example, Bangladeshi officials report that the price of cooking oil – of which it imports 1.2 million tons a year – has almost tripled in the past two years because it is now valued as an alternative to diesel oil.

    Of course it’s hard to say exactly how these disturbing trends will work out, but it’s unlikely that there is going to be an easy resolution. The rising cost of oil, one of the central catalysts of the crisis, is not a product of a political showdown as in the 1970s, but rather of speculation prompted by increasingly tight supplies. Moreover, short-term thinking is not likely to resolve our problems. The specter of famine may, for example, lead farmers the world over to expand crop production to ecologically sensitive or otherwise marginal areas. Yet although this may solve a potential crisis in the short term, it obviously does not represent a viable solution to the gathering crisis of the global industrial agricultural system. A more sustainable approach is suggested by FAO head Jacques Diof. With oil and food prices at near record highs, Diof recently argued that rich countries should stop sending food aid to poor nations and should instead concentrate on helping farmers grow food locally. Mr. Diof’s plan echoes the call of the international organization Via Campesina, which has made food sovereignty a cornerstone of its battle for peasant rights.

    Until now, however, such an approach has fallen on deaf ears in the halls of powerful international institutions such as the World Trade Organization, which have been dominated by the notion of food security advanced by the US, which argues, as always, for free trade since its industrially produced food products have until now been able to undercut the prices of all competitors on international markets. The result has been policies of food dumping, slashing of price supports that keep small farmers solvent, privatization of credit, and the patenting of crop genetic resources that have combined to push millions of farmers off their land and into the metastasizing mega-cities of the global South. Agriculture is now one of the most monopolistic of industries, with a handful of giant transnational corporations like Monsanto controlling both ends of the production process. Mr. Diof’s call for food sovereignty thus implies a wide-ranging transformation of the central institutions of globalization and, indeed, of the entire system of globalized industrial agriculture.

    With the contradictions of the industrial food system piling up to potentially deadly effect, it is high time we rejected this unsustainable model of globalized food and turned instead to the more sustainable model of local production and food sovereignty championed by organizations like Via Campesina. Organizing a local pasta strike might be a good if humble way to make this point. One can only hope that it will not take bloody bread riots and large-scale famines to push the world down a more sustainable path.

    Ashley Dawson is the author of Mongrel Nation: Diasporic Culture and the Making of Post-Colonial Britain and co-author with Malini Johar Schueller of "Exceptional State: Contemporary US Culture and the New Imperialism".

  • Planet Ark after 5000 tonnes of printer waste

    Planet Ark story 

    Environmental company Planet Ark and print cartridge recylcer, Close the Loop, have teamed up to recycle the 5,000 tonnes of print cartridges that are currently dumped as landfill every year in Australia. The initiative is known as Cartridges for Planet Ark and provides recycling boxes around the country to encourage people to starve landfill sites of the 34 cartridges that are thrown out, every minute. Despite the inefficiencies of recycling when compared to re-use, the printer companies backing the initiative point out that recycling the resources in the cartridges is more environmentally friendly than throwing them out.

  • Wind cracks one percent in US

    Representative Wind Project and Wind Power Costs

    Lawrence Berkeley National Laboratory (LBNL) recently examined the estimated installation and power costs for twelve recent wind projects, finding that 2007 wholesale power prices for these projects range from 2.5 cents/kWh to 6.4 cents/kWh. Six of the projects provide wholesale power at less than 3 cents/kWh. These prices reflect available state and federal incentives, such as the Production Tax Credit, and any value from Renewable Energy Credits.

    As shown in Figure 1, also developed by Lawrence Berkeley National Laboratory, average wind power prices have trended downward over time, notwithstanding a more recent increase in those prices. Even with the increase, however, wind power is found to be competitive with wholesale power prices and with the cost of operating new natural-gas power plants. This is especially true if the production tax credit is maintained.

    Figure 1: Comparison of Wind Power Prices with the Cost of Conventional Generation
    Source: Lawrence Berkeley National Laboratory

    Factors Affecting Costs and Future Cost Trends

    As the LBNL findings show, the cost of wind projects can vary by a factor of three or more. The reasons for these are varied but include: installation and material costs (turbines purchased in 2004 and 2005 are less expensive than those purchased in 2006 and 2007), relative wind resources (Class 5 wind sites result in higher capacity factors than Class 4 or 3 wind sites), and developer/owner (i.e. experienced developers such as FPL Energy may be able to develop and construct projects at lower cost).

    Wind power prices have trended up over the last couple years as shown in Figure 1, and as confirmed by Figure 2, a reflection of increasing installed project costs. This trend is now seen across all capital-intensive energy technologies. Reasons for these increasing costs include: weakness in the dollar; rising materials costs; the move towards increased manufacturing profitability; and a shortage of manufacturing components.

    Although many of these cost drivers are global, higher costs for wind in the U.S. are also attributable to limited U.S.-based manufacturing of wind-turbines. U.S. turbine manufacturing remains somewhat limited due to uncertainty about demand and the continuation of the Production Tax Credit. New manufacturing plants are being built in the U.S. (for example, the Clipper Windpower plant in Iowa and the Suzlon plant in Minnesota), albeit not at the same pace as in other parts of the world. Some of the 2006 wind power prices reflect lower turbine costs locked in 18-24 months earlier.

    In 2007, wind project and power costs are likely to trend higher as they will reflect increasing turbine costs. The increasing cost of wind turbines is partially mitigated by improvements in wind project performance. Increases in project capacity factors have been primarily driven by higher turbine heights, improved siting, and technological advancements. As noted earlier, however, these cost trends are affecting other forms of electricity generation as well and, as Figure 1 shows, wind power remains competitive with wholesale power prices and with the cost of operating new natural-gas power plants.

    Figure 2: 2006 Wind Power Price by Commercial Operation Date (COD)

    Global Wind Energy Costs

    The U.S. has the third-largest cumulative wind capacity globally, lagging only behind Germany and Spain. Both Germany and Spain have more sizeable national support programs for wind energy (such as guaranteed feed-in tariffs) as compared to the U.S. In Germany, grid operators must pay wind energy providers .0836 €/kWh (.12 US$/kWh ) for turbines installed in 2006 for at least the first five years of operation. This starting tariff decreases by 2 percent annually.

    In recognition of increasing turbine costs, Germany recently reduced the annual tariff degression from 2 percent to 1 percent per year. Germany will also pay a bonus of € 0.007/kWh (.01 US$/kWh) for wind turbines that are more compatible with the needs of the grid. Germany manufacturers report explosive job growth for the wind energy sector and the creation and influx of technology firms to support the wind energy industry. All told, job growth in the roughly 25 percent of the German energy sector devoted to renewable energy was in 2006 equal to job growth in the entire rest of the energy generation sector.

    As cumulative wind capacity increases in Germany and Spain, both countries are revising their rules regarding price support for wind energy. Spain has draft rules to establish maximum, as well as minimum, prices to be paid to wind farm operators. Under Spain’s draft rules, for the first five years of operation, a wind farm operator will receive a maximum of .084 €/kWh (.12 US$/kWh) and minimum of .068 €/kWh (.099 US$/kWh). The tariff levels decline over the duration of the plant’s operation.

    Both Germany and Spain, as well as Denmark and other nations that have supported the development of significant wind energy industries, have documented significant job growth in the clean energy sector. Export orders for wind turbines in Germany, Spain, and Denmark have now resulted in significant new job creation.

    Green-Biz Editor-at-Large Daniel M. Kammen is the Class of 1935 Distinguished Professor of Energy at the University of California. He co-directs the Berkeley Institute of the Environment (http://bie.berkeley.edu) and is founding director of the Renewable and Appropriate Energy Laboratory (http://rael.berkeley.edu). Kammen has served as a lead author for the Intergovernmental Panel on Climate Change, which shared the 2007 Nobel Peace Prize. He has appointments in the Energy and Resources Group and the Goldman School of Public Policy.