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  • Humans faced extinction before leaving Africa

    Wells is director of the Genographic Project, launched in 2005 to study anthropology using genetics. The report was published in the American Journal of Human Genetics.

    Previous studies using mitochondrial DNA — which is passed down through mothers — have traced modern humans to a single ”mitochondrial Eve,” who lived in Africa about 200,000 years ago.

    The migrations of humans out of Africa to populate the rest of the world appear to have begun about 60,000 years ago, but little has been known about humans between Eve and that dispersal.

    The new study looks at the mitochondrial DNA of the Khoi and San people in South Africa which appear to have diverged from other people between 90,000 and 150,000 years ago.

    The researchers led by Doron Behar of Rambam Medical Center in Haifa, Israel and Saharon Rosset of IBM T.J. Watson Research Center in Yorktown Heights, N.Y., and Tel Aviv University concluded that humans separated into small populations prior to the Stone Age, when they came back together and began to increase in numbers and spread to other areas.

    Eastern Africa experienced a series of severe droughts between 135,000 and 90,000 years ago and the researchers said this climatological shift may have contributed to the population changes, dividing into small, isolated groups which developed independently.

    Paleontologist Meave Leakey, a Genographic adviser, commented: ”Who would have thought that as recently as 70,000 years ago, extremes of climate had reduced our population to such small numbers that we were on the very edge of extinction.”

    Today more than 6.6 billion people inhabit the globe, according to the U.S. Census Bureau.

    The research was funded by the National Geographic Society, IBM, the Waitt Family Foundation, the Seaver Family Foundation, Family Tree DNA and Arizona Research Labs.

    ——

    On the Net:

    The Genographic Project: www.nationalgeographic.com/genographic

  • Hear about the mechanics of shark bite

    Dr Wroe's modelSr Stephen Wroe of the University of New South Wales, backs up Valerie’s observations in the field with evidence from computer models that mimic shark bite. Hear him interviewed on the Generator by Rosy Whelan.

  • Sea Shepherd takes on shark finners

    Paul Watson in Sharkwater This compilation of interviews about life with Sea Shepherd mainly refers to Paul Watson’s work with whales. Of course, Watson has been actively involved in saving sea life in general and is central to Sharkwater, the film made by Rob Stewart. Find out more about Sharkwater .

    Listen to The Generator talking to Paul Watson himself and people who have sailed with him. 

  • How the rich starved the world

     From the New Statesman

    The irony is extraordinary. At a time when world leaders are expressing grave concern about diminishing food stocks and a coming global food crisis, our government brings into force measures to increase the use of biofuels – a policy that will further increase food prices, and further worsen the plight of the world’s poor.

    What biofuels do is undeniable: they take food out of the mouths of starving people and divert them to be burned as fuel in the car engines of the world’s rich consumers. This is, in the words of the United Nations special rapporteur on the right to food, Jean Ziegler, nothing less than a “crime against humanity”. It is a crime the UK government seems determined to play its part in abetting. The Renewable Transport Fuel Obligation (RTFO), introduced on 15 April, mandates petrol retailers to mix 2.5 per cent biofuels into fuel sold to motorists. This will rise to 5.75 per cent by 2010, in line with European Union policy.

    The message could not have been clearer if the Prime Min ister, Gordon Brown, had personally put a torch to a pyre of corn and rice in Parliament Square: even as you take to the streets to protest your empty bellies and hungry children, we will burn your food in our cars. The UK is not uniquely implicated in this scandal: the EU, the United States, India, Brazil and China all have targets to increase biofuels use. But a look at the raw data confirms today’s dire situation. According to the World Bank, global maize production increased by 51 million tonnes between 2004 and 2007. During that time, biofuels use in the US alone (mostly ethanol) rose by 50 million tonnes, soaking up almost the entire global increase.

    Next year, the use of US corn for ethanol is forecast to rise to 114 million tonnes – nearly a third of the whole projected US crop. American cars now burn enough corn to cover all the import needs of the 82 nations classed by the UN’s Food and Agriculture Organisation (FAO) as “low-income food-deficit countries”. There could scarcely be a better way to starve the poor.

    The threat posed by biofuels affects all of us. Global grain stockpiles – on which all of humanity depends – are now perilously depleted. Cereal stocks are at their lowest level for 25 years, according to the FAO. The world has consumed more grain than it has produced for seven of the past eight years, and supplies, at roughly only 54 days of consumption, are the lowest on record.

    The president of the World Bank, Robert Zoellick, has already warned that 100 million people could be pushed deeper into poverty because of food price rises caused directly by this imbalance between supply and demand. Even consumers in rich countries are suffering. We now pay higher prices for our food in order to subsidise the biofuels industry, thanks to measures such as the renewable fuels directive.

    This is not just a short-term price blip, but the beginnings of a major structural change in the world food market. Population pressure – still something of a taboo subject – is also certainly playing a part. With the world population growing by 78 million a year, and expected to reach nine billion by the middle of the century, there are simply many more mouths to feed.

    In addition, rapid economic growth in India and China has created tens of millions of new middle-class consumers, all demanding western-style diets high in meat and dairy products, thereby vastly increasing the quantity of grain required for livestock production.

    Weather plays a major role, too: the FAO’s latest food situation brief reports that, in 2007, “unfavourable climatic conditions devastated crops in Australia and reduced harvests in many other countries, particularly in Europe”, while Southern Africa and the western United States have been hit hard by severe drought. Rising oil prices also increase the cost of food, as fossil fuels are important throughout the agricultural process, from tractor diesel to fertiliser production.

    Inconsistency

    The most important structural change, however, is the increasing interlinking of world energy and food markets. Once, food was just for people. Now rising demand for transport fuel – particularly in rich countries – is sucking supply away from the world food market and increasing the upward pressure on prices. In the words of Josette Sheeran, executive director of the UN World Food Programme (WFP): “We are seeing food in many places in the world priced at fuel levels,” with increasing quantities of food “being bought by energy markets” for biofuels.

    Rising oil prices feed back into the process. With food and fuel markets intertwined, increases in the price of oil are shadowed by increases in the price of grain. The real-world result from this structural shift may be that hundreds of thousands of people starve in the next few years – unless policies promoting biofuels are urgently reversed.

    This is not to suggest that government targets on biofuels are driven by some kind of malicious desire to starve the world’s poor. Indeed, both Brown and his Chancellor, Alistair Darling, have expressed concern about the food supply crisis and the role of biofuels in causing it. But for these two political leaders to voice their concerns while allowing the increased use of biofuels in the UK to be pushed forward – all in the same week – is nothing short of bizarre.

    As Oxfam’s Robert Bailey puts it: “This inconsistency at the highest levels simply beggars belief.” The aid agency calculates that the RTFO represents a £500m annual subsidy from motorists and taxpayers to the biofuels industry – more than double the amount the WFP is urgently seeking from donor countries to try to mitigate the impact of food price rises on the world’s poor.

    The EU, meanwhile, persists in the erroneous belief that biofuels can help reduce greenhouse-gas emissions. The main reason for its speedy introduction of the replacement fuel initiative was as a sop to motor manufacturers who were lobbying hard against proposed higher fuel economy standards. With biofuels, the EU hoped, it could cave in to the car industry while still getting reduction in emissions.

    Yet recent research suggests otherwise: two major studies published in Science magazine in February showed clearly that once the agricultural displacement effects of the new fuels on rainforests, peatlands and grasslands are taken into account, emissions are many times worse than from conventional mineral petrol. In other words, it would be better for the climate if we just went back to fossil fuels. Biofuels are not a “necessary but painful” way of saving the climate; they are a calamitous mistake by almost every criterion, whether social, ethical or environmental.

    Reversing the damage

    The industry claims that “second-generation” biofuels, using by-products such as corn stalks and woodchip as a feedstock, will be able to redress the balance. But if this technological advance is achieved (and that is by no means certain) it could usher in an even worse scenario: the annihilation of the world’s forests. If all plant life was seen as potentially convertible for transport fuel, there would be nothing to stop what was left of the planet’s biosphere from being strip-mined to keep rich motorists on the road. There is no simple solution. Much of the increased biofuel demand comes from the US, where Democratic and Republican politicians alike have talked themselves into a dead-end search for “energy security” – with US-grown corn top of the list.

    But the UK and the EU can reverse some of the damage by immediately ditching their own biofuels policies and providing vital aid funding, principally through the WFP, to help prevent widespread starvation in the short term. Politicians need to realise that there is no such thing as “sustainable biofuels”, either now or in the future. As for investors, they need to realise that pouring money into biofuels is a bad bet: subsidies will be quickly withdrawn when policymakers face up to the reality of their ghastly error.

    In the meantime, millions face starvation and death from increasing hunger and malnutrition. There is no time to lose.

    2008: the year of food riots

    Egypt Thousands of demonstrators in Mahalla el-Kobra loot shops and throw bricks at police during protests at rising food prices and low salaries, as part of nationwide strike

    Haiti At least four people killed in the southern city of Les Cayes after food prices rise 50 per cent in the past year

    Côte d’Ivoire Police injure more than ten protesters as several hundred demonstrators demand government action to curb food prices

    Cameroon Riots last four days and result in at least 40 deaths. Unrest is due to high fuel and food prices. Worst riots in country for 15 years

    Mozambique At least four people killed and 100 injured following fuel price rises

    Senegal Violent demonstrations in Dakar as prices of rice, milk and oil soar. Senegal imports almost all its food

    Yemen Five days of rioting and a hundred arrests after the price of wheat doubled over two months. Protesters set up roadblocks in Sana’a and Aden

    …and in Mauritania, Bolivia, Indonesia, Mexico, India, Burkina Faso, and Uzbekistan

    Research by Jax Jacobsen

  • Youth slam 2020 Summit

    I was there as a representative of the youth movement – with the simple message that we are running out of time to act on climate change, we must make fundamental changes to our economy now, and that we urgently need to do whatever is most effective to safeguard our climate and our future.

    So I came to the Summit willing to listen to new ideas and creatively brainstorm around a few I’d been thinking about – a personal carbon allocation scheme, and a nation-wide green job creation scheme. We could design a massive green job program that would inspire Australians to get involved, create hundreds of thousands of new jobs, and make Australia a world leader in renewable energy and energy efficiency. These were just two of my ideas: I was excited to hear what others had come up with.

    However, it became clear at the start of the summit that members of the coal industry and their ‘business as usual’ allies had pre-determined their position and approach – and it was one that aggressively pushed so-called ‘clean coal’ and argued for more subsidies to the coal industry for them to build clean coal plants. At one point a delegate argued against reducing Australia’s carbon footprint (ostensibly because we have a ‘special place in the world’ and could provide energy for the rest of the world – I was unsure why we couldn’t still do this while reducing our emissions if we move to renewables). Peter Coates, from the giant coal mining company Xstrata, even argued to abolish the Mandatory Renewable Energy Target. This is the position of the Australian Industry Greenhouse Network, who are focusing all their efforts this year on undermining the emissions trading scheme by proposing free permits to coal-fired power generators – which totally undermines the point of a trading system.

    One of the coal industry members stated that he wanted a level playing field for so-called ‘clean coal’ and that the Mandatory Renewable Energy Target is unfair. This is laughable considering that the fossil fuel industry in Australia already receives $9 billion in federal subsidies each year – 28 times more than what is spent on renewable energy.

    The day before the Summit, twenty 20-year-olds representing all major Australian youth organisations presented a Statement calling for urgent and immediate action on climate change to Minister for Youth, Kate Ellis, in Canberra. The Statement urges the government to give young Australians a real chance of a safe future by urgently adopting much deeper greenhouse gas emission reduction targets. The organisations call on the government to make Australia a world leader in energy efficiency and renewable energy, which would create thousands of jobs for young Australians.

    At the end of the Summit, youth delegates re-grouped and voiced our frustration and disappointed at the way the coal industry had hijacked the climate agenda. They did not act in good faith, but rather pushed their business agenda, meaning a small minority silenced the majority of people in the room who pushed for a statement calling for no new coal-fired power stations in Australia (unless or until carbon capture and storage was proven to work, proven safe, efficient and commercially viable – which it is not at this stage, and the majority of the climate movement believe it will never be). We believe that the sense of urgency – our future is at stake – was lost. We released a statement to the media congratulating the Rudd government for their willingness to hear our ideas, but condemning the coal lobby for their intervention, which obstructed discussion of some really new ideas. 

    Youth certainly don’t blame Penny Wong or Kevin Rudd for the weak outcomes on climate change from 2020. I was excited to be involved and thought the idea of an ideas-generating summit was excellent. The coal industry, however, used the Summit to push their agenda through an organised attempt – strategically, in the lead-up to the federal budget – to position so-called ‘clean coal’ as the solution to climate change and one in need of more federal subsidies to coal. We do not need new coal in Australia. We can deploy energy efficiency and renewable energy, and fundamentally change our society and economy – for example through distributed energy systems rather than the centralised grid. And we could do it tomorrow, long before ‘clean’ coal has been proved or disproved (In fact, the majority of the climate movement say it has already been disproved).

    Our generation expected – and needed – better outcomes from the 2020 Summit for our climate, and our future. As Friday’s youth statement reads, "We have one climate, one future, and one chance to save it".

  • Business wakes up to peak water

    Peter Brabeck-Letmathe, chief executive of Nestle, the foods group, says businesses must wake up to the value of water. He warns of an impending crisis over supply, in the developed as well as the developing world, because of climate change and problems of over-use.

    He says businesses may struggle in the future to find the water they need and will be forced to pay much higher prices for it, if more is not done to conserve the resource and distribute it more rationally.

    These problems are not confined to poor countries, warns Mark Lane, partner at the law firm Pinsent Masons: "[While] it is true that in the developed world most people have access to toilets and a sewerage system … the problem that the developed world now faces is to adapt its waste-water systems to the changing circumstances brought about by climate change, and sudden much more extreme bouts of rainfall."

    Mr Lane points out that in much of the developed world, the wastewater infrastructure has been constructed on the assumption of a temperate climate.

    With global warming, which will bring more storms and floods and intense bouts of rainfall interspersed with periods of drought, that assumption no longer holds good.

    As a result, in many countries the wastewater infrastructure will need to be expanded and upgraded to cope with much greater volumes of storm water. "This will cost huge sums of money," says Mr Lane, "and one key issue, for example in England and Wales, is how such infrastructure improvements are to be paid for."

    Businesses can prepare by using water more efficiently. Some companies have started to take action, and a growing number of technologies are becoming available for businesses to make their use of water more efficient.

    Pepsi Bottling Group (NYSE:PBG) , the drinks company, has managed to conserve 1m gallons of water per year at each of its plants, using new processes for cleaning equipment. The company can save 13,000 gallons a day on certain high-speed lines by using air instead of water to clean packaging. The company also uses 10 per cent less water through its upgraded reverse osmosis purification systems.

    B&Q, the retail chain, has been actively monitoring water consumption since 2003. The company set a target to reduce mains use across UK outlets by 10 per cent by the end of 2008, but found that by the end of 2007 it was saving 20 per cent.

    This has been achieved using methods such as harvesting rainfall for toilet flushing and using "smart water metering", allowing store managers to see in real-time how much water they are using. Monitoring use in this way lets the company quickly identify and deal with leaks, and helps prevent excessive usage.

    Other techniques include recycling water. For instance, Dow Chemical (NYSE:DOW) at its Terneuzen site in the Netherlands has been re-using about 70 per cent of the 2.6m gallons of the municipal waste water produced daily in the area.

    Cutting water use can also help to cut energy use – Dow found its efforts at Terneuzen reduced its carbon dioxide emissions by 60,000 tonnes per year.

    But companies and consumers may be unaware of the amount of water they use, and the amount that goes into products.

    Embedded water, also known as virtual or hidden water, is the water used in the production of goods that is invisible to the end user.

    Examining the amount of embedded water in common products can give startling results. It takes 2,400 litres to produce a hamburger, and 11,000 litres to make a pair of jeans, including the water needed to grow the cotton.

    Tim Jones, principal at Innovaro, says companies could attach "water labels", just as some are using carbon labels showing how much greenhouse gas was emitted during production. This would enable purchasers to make decisions based on environmental principles.