Eco Living | News & Views

Sun’s ‘quiet period’ explained

Solar physicists may have discovered why the Sun recently experienced a prolonged period of weak activity.

The most recent so-called “solar minimum” occurred in December 2008.

Its drawn-out nature extended the total length of the last solar cycle – the repeating cycle of the Sun’s activity – to 12.6 years, making it the longest in almost 200 years.

During a solar minimum the Sun is less active, producing fewer sunspots and flares.

The new research suggests that the longer-than-expected period of weak activity may have been linked to changes in the way a hot soup of charged particles called plasma circulated in the Sun.

The study, conducted by Dr Mausumi Dikpati of the National Center for Atmospheric Research in Colorado and her US colleagues, is published in the journal Geophysical Research Letters.

The Sun’s activity strengthens and weakens on a cycle that typically lasts 10.7 years. Since accurate records began in 1755, there have been 24 such solar cycles.

The 23rd cycle, which ended in December 2008, was both longer than average and had the smallest number of sunspots for a century. Sunspots are areas of intense magnetic activity that are visible as dark spots on the star’s surface.

Currents of fire
The new research suggests that one reason for the prolonged period of weak activity could be changes in the Sun’s “conveyor belt”.

Similar to the Earth’s ocean currents, the Sun’s conveyor transports plasma across its surface to the pole. Here, the plasma sinks into the heart of the Sun before rising again at the equator.

During the 23rd cycle, these currents of fire extended all the way to the poles, while in earlier cycles they only extended about two thirds of the way.

Dr Roger Ulrich of the University of California, Los Angeles, a co-author of the study, said the findings highlighted the importance of our monitoring of the Sun.

The research team used sophisticated computer simulations to show how changes in the conveyor might have affected cycle duration. They found that the increased length of the conveyor and its slower rate of return flow explained the prolonged 23rd cycle.

However, Dr David Hathaway, a solar physicist from Nasa’s Marshall Space Flight Center in Alabama, who was not involved in the latest study, argued that it was the speed and not the extent of the conveyor that was of real importance.

The conveyor has been running at record high-speeds for over five years. Dr Hathaway said: “I believe this could explain the unusually deep solar minimum.”

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Woolly mammoth extinction ‘not linked to humans’

Woolly mammoths died out because of dwindling grasslands – rather than being hunted to extinction by humans, according to a Durham University study.

After the coldest phase of the last ice age 21,000 years ago, the research revealed, there was a dramatic decline in pasture on which the mammoths fed.

The woolly mammoth was once commonplace across many parts of Europe.

It retreated to northern Siberia about 14,000 years ago, where it finally died out approximately 4,000 years ago.

The reasons for its extinction are unclear and have been a matter of heated scientific debate.

Some scientists have argued that it was principally the result of climate change while others say that it was driven by pressures of a growing human population, or even a cataclysmic meteor strike.

Now, according to Professor Brian Huntley of Durham University, that debate has been settled.

“What our results have suggested is that the changing climate, through the effect it had on vegetation, was the key thing that caused the reduction in the population and ultimate extinction of mammoths and many other large herbivores,” he said.

Professor Huntley and his colleagues created a computer simulation of vegetation in Europe, Asia and North America over the last 42,000 years.

They did this by combining estimates of what the climate was like during this period with models of how various plants grow under different conditions.

They found that the cold and dry conditions during the ice age, with reduced concentrations of carbon dioxide, didn’t favour the growth of trees.

So instead of forests there were vast areas of pasture, which was ideal for large herbivores, such as woolly mammoths. But as a result of a warmer, wetter climate and rising concentrations of carbon dioxide at the end of the ice age, trees emerged at the expense of the grasslands.

“During the height of the ice age, mammoths and other large herbivores would have had more food to eat,” said Professor Huntley.

“But as we shifted into the post-glacial stage, trees gradually displaced those herbaceous ecosystems and that much reduced their grazing area.”

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Eon installs first turbine on MoD land

The first wind turbine to be used on Ministry of Defence (MoD) land has been installed by Eon at the Duke of York’s Royal Military School in Kent.

Over the 20-year lifespan of the turbine, it will save 114 tonnes of carbon emissions and will help contribute to the MoD’s target of generating ten percent of power from renewable sources.

The Duke of York’s Royal Military School is used to educate the children of serving army personnel and the turbine is also intended to teach pupils about renewable energy.

Colin Grenville, Eon’s microgeneration sales manager, told BusinessGreen: “Up to now, wind energy was seen as a bit of a no-go for MoD sites as there had been a number of issues with radar interference. This project shows what can be done even where there has been historic opposition.”

Mr Grenville added that the energy company was in talks with the MoD about installing more turbines.

The UK generated 6.7 percent of its electricity from renewable sources in 2009, statistics released recently by the Department of Energy and Climate Change show.

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Branches of low carbon restaurant chain to open in the UK

The low carbon restaurant chain Otarian is to open its first UK branches in London this week.

Based on the principle of vegetarianism, the chain will be the first to include information on carbon footprints to internationally recognised standards on all of its menus .

Restaurants in Wardour Street, Soho, Shaftesbury Avenue, and Covent Garden are due to open on August 20th.

Otarian operates a no air freight policy, meaning all products are delivered by road and if a reliable supply cannot be obtained the dish is altered.

Some 98 per cent of waste from the restaurant is either composted or recycled and sustainable building products, such as floor tiles made from recycled glass, are used throughout the building design.

Radhika Oswal, said that vegetarianism is the most sustainable way of living as it has “a lighter ecological footprint, reduced resource impacts, and lower carbon emissions than non-vegetarian equivalents”.

A report released earlier this year by the Centre for Alternative Technology entitled Zero Carbon Britain suggested that an 80 per cent reduction in livestock in the UK would contribute to the country producing zero emissions by 2030.

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Green investment ‘covers a wide range of techniques’

Green and ethical investments no longer centre around leaving some companies out of a stock portfolio, one expert has suggested.

Penny Shepherd, chief executive of UKSIF – the sustainable investment and finance association, said that sustainable investment now covers a wide range of investment techniques and is “fundamentally about making a positive choice”.

Ms Shepherd said that this could include choosing the most responsible company in the sector, working with fund managers that encourage companies to improve their performance or investing in new “sunrise industries rather than sunset industries”.

“We are in a situation where the new coalition government says it will be the greenest government ever [and] that should make a difference both to companies managing their social and environmental impact and those who provide them with the tools to do that better,” she added.

The comments come after figures from the Investment Management Association showed that net retail sales of ethical funds in the second quarter of 2010 were at their highest level since the final three months of 2007.

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Young people ‘must be attracted to energy industry’

More must be done to attract young people to careers within the energy industry, it has been claimed.

Zoe Robinson, ethical development manager at Warren Evans, said that the government and private sector must work in partnership to provide opportunities within the sector for school leavers and the long-term unemployed.

She added: “The UK can only be world leaders in the green energy revolution if we have world-leading skills.”

The comments come after energy firm Centrica warned of an emerging skills gap as many undergraduates are shunning employment opportunities in the industries that will contribute to low carbon growth.

One in four parents that took part in the survey said they would not actively encourage their children to enter the science, technology and energy sectors.

Ms Robinson warned that with the government cuts taking place in the Department of Energy and Climate Change, the coalition will have to “find new ways of delivering the green agenda”.

“While the public can do its part, the government’s responsibilities to deliver on this agenda will obviously not be met by telling us all to switch off our TVs,” she added.

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Majority of UK businesses ‘not measuring carbon footprint’

The majority of UK companies do not measure their carbon footprint yet, the Carbon Trust has claimed.

Britain’s largest business and public organisations now have less than 50 days to sign up to the Carbon Reduction Commitment (CRC) Energy Efficiency Scheme, which is intended to help the country meet its carbon reduction target.

However, a survey conducted by the trust revealed that just 26 per cent of firms make the effort to measure their emissions, Bloomberg reports.

Some 38 per cent of the 200 finance directors who took part in the poll said that they planned to begin monitoring their carbon footprint in the next five years.

Harry Morrison, general manager of the Carbon Trust, said that finance departments are playing a greater role in monitoring emissions. Earlier this year, Mr Morrison said that the key to implementing a successful CRC strategy lies within the internal audit and data collection processes.

“In many companies, the finance team in their internal audit function are best placed to have a robust view of carbon and environmental data than the energy and climate teams may have done in the past,” the news provider quoted him as saying.

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New standards for eco products

The development and global implementation of a new environmental ratings system could make product comparisons easier for consumers across the world.

The US-based Association of Home Appliance Manufacturers (AHAM) announced on August 10 that it had partnered with Canadian Standards Association and international US-based group UL Environment, two leading standards organizations. The three groups intend to develop a series of new standards which can be used by governments, retailers and consumers worldwide to identify and promote environmentally responsible products.
The new standards of environmental efficiency will take into account not just the energy consumption of the product, but also its ecological impact across its lifetime. In a press release, the American and Canadian companies stated that they intended to develop a “metric that will instill consumer confidence.”

Increased transparency in environmental standards is needed as consumers become increasingly ecologically aware and manufacturers begin responding to their demands; it is not yet known when the firms will have completed drafting the new standards, or when they will be implemented.
Currently low environmental impact products are awarded under the Energy Star system and are available throughout America and Europe; energy-efficient EU products also carry a green flower symbol.

Consumer websites such as www.energystar.gov in the United States, www.energysavingtrust.org.uk in the UK and www.ecolabel.eu in Europe provide environmental ratings and information on a number of household appliances such as refrigerators and washing machines.

It is hoped that development of a new system of environmental ratings could lead to a comprehensive global standardized environmental rating system, simplifying product comparisons for consumers and allowing them to avoid “greenwashing” or misleading ecologically oriented marketing.

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Green cleaning: There’s the scrub

Our products harm the environment. They are not environmentally friendly. We never say they are environmentally friendly.” Who is saying this? BP’s Tony Hayward, perhaps?

Actually these are the words of Mick Bremans, chief executive of Ecover, the biggest-selling brand of “ecological” cleaning and laundry products in Britain. Despite celebrating 30 years in the business of selling greener, cleaner household products, Bremans’ team at Ecover has not yet discovered a dishwasher tab or laundry liquid that is what the consumer with a conscience is looking for – environmentally friendly.

In fact, Bremans is making the point that no product, be it a lavatory cleaner, a hybrid car or a locally sourced punnet of strawberries, is technically environmentally friendly. Everything we make takes its toll on the planet in production and leaves its mark when disposed of. Instead, Ecover describes its products as “ecological”, to communicate that they are kinder to the environment than comparable products.

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German power plant testing CO2-scrubbing algae

Swedish energy group Vattenfall said it had launched a major pilot project using algae to absorb greenhouse gas emissions from a coal-fired power plant in eastern Germany.

The two-million-euro (2.6-million-dollar) trial run, which will continue until October 2011, in the depressed Lausitz mining region is one of several experimental attempts in the sector using algae to slash carbon dioxide output.

“The microalgae use climate-killing CO2 to create valuable biomass,” the chairman of Vattenfall Europe Mining and Generation, Hartmuth Zeiss, said in a statement.

“Moreover the new technology will bring useful know-how to the Lausitz and increase its importance as a region for energy production.”

Half the funding for the project called green MiSSiON (Microalgae Supported CO2 Sequestration in Organic Chemicals and New Energy) comes from Vattenfall, the other half from state and European Union subsidies.

The gas emitted at the Senftenberg brown-coal-fired plant is being pumped through a kind of broth using algae cultivated in 12 plastic tanks.

“The aim is to find out what kinds of algae work with brown coal dust and then, how economical this kind of CO2 reduction is,” a spokesman for the Vattenfall division, Axel Happe, told AFP.

The biomass produced in the process can be used to produce biodiesel, to feed biogas power plants and as a nutritious supplement in fish food, Happe said.

He said it was difficult to quantify the amount of CO2 emissions normally emitted at Senftenberg or estimate how sizeable the reduction could be with the use of algae, which can scrub 10 times as much CO2 as land-based plants.

But he said the company aimed to publish initial results in late 2011.

A project at the Massachusetts Institute of Technology in 2008 found that diverting CO2 through an algae broth could reduce emissions by as much as 85 percent.

Vattenfall is the third biggest electricity provider in Germany.

Last month, European aerospace giant EADS unveiled what it called the world’s first “hybrid” aircraft to run on algae fuel.

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