Showing posts with label science. Show all posts
Showing posts with label science. Show all posts

Tuesday, February 05, 2013

Crunch carrots, cut climate change

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We really need to be redoubling our efforts to tackle climate change. Just look at the blog entry before this one, where Stern says the problem is far worse than he'd previously described in his highly influential report - and the entry before that on government giving the cold shoulder to action on climate. Many think of efforts to tackle climate change in terms of flying less, driving less, using renewable, low carbon energy sources, insulating our homes, recycling materials...but adjusting our diet is not so commonly mentioned.

Changing to a lower meat, higher fruit and veg diet can in fact be one of the most effective ways of lowering carbon emissions and tackling climate change, especially if beef consumption is reduced or eliminated. Consider the estimated total eco footprint of meat compared with fruit and vegetables: 6.9 to 14.6 hectare yrs per tonne for meat (calculated using average global yield and embodied energy data - the range is due to pasture-fed vs grain-fed animals); as against 0.3 to 0.6 hectare yrs per tonne for a range of fruits, roots and vegetables (calculated using average global yield for a range of veg, with an allowance for transport, processing and energy for farming).

These estimates from the book Sharing Nature's Interest by footprint experts Chambers, Simmons and Wackernagel (2000) show the the environmental impact of meat is 11 to 49 times higher than fruit and vegetables. This chimes with the basic science because the food chain for meat is obviously longer, with many vegetables and grains being grown for use as animal feed. [Meat impacts are 1.5 to 8.5 times higher than grains and pulses too.]  Beef farming has a very high climate impact due to: rainforest clearance to create the farmland, perhaps by burning; grain feeding the animals; methane released by the cows metabolism, (and dont forget the long distance trade in frozen meat).

In short: crunch carrots more, eat meat less and you will contribute to cutting climate change! Whether the fruit and veg are chemically grown abroad, or locally and organically grown, they're going to have lower climate impact than any kind of meat. There are other benefits too as lower meat diets are cheaper and healthier. Carrots for instance - given that it was National Carrot Day on 3 Feb and that it will be International Carrot Day on 4 April  - have the highest vitamin A content of all veg and are loaded with vitamin B6, vitamin C and potassium too. Find out more from this amazing, if somewhat bizarre site: http://www.carrotmuseum.co.uk/    

Tuesday, January 22, 2013

Steiner Secrecy??

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Excellent blog post here by Andy Lewis on the Steiner Free School that is being proposed in Bristol (see this Post story for the latest news on this here). Andy is rightly calling for the school's advocates to be fully open about what Rudolf Steiner (see left) and Anthroposophy stand for and whether/how this will be put into practice if the Bristol Steiner Free School goes ahead. Andy asks these pertinent questions:

1. Will you publish what associations you have with the Anthroposophical Movement?
 
2. Will you publish a full discussion of how Anthroposophy and Steiner’s work inspire teaching within the school?
 
3. Will you fully state how you ensure Steiner’s racial teachings do not influence the School?
 
4. Will you explain how Steiner’s work influences your teaching of science?
 
5. Will you publish what the spiritual and religious elements of your curriculum are?
 
6. What role does Anthroposophical Medicine play in your School’s ethos and how will you ensure parents are fully informed and the nature of any therapies or treatments given to students?
 
7. Will you tell parents about the gnomes?

You can read more views on Steiner and see links to many others from here: http://www.openwaldorf.com/steiner.html . Also see my previous post on the proposed school which expresses my particular concern that Steiner's ideas are highly inconsistent with modern science here.

Monday, July 30, 2012

Scepticism squashed?

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The BBC report that: A formerly sceptical climate scientist says human activity is causing the Earth to warm, as a new study confirms earlier results on rising temperatures...

...latest study, released early on Monday (GMT), concludes that the average temperature of the Earth's land has risen by 1.5C (2.7F) over the past 250 years.

...In a piece authored for the New York Times, Prof Muller, from the University of California, Berkeley, said: "Three years ago I identified problems in previous climate studies that, in my mind, threw doubt on the very existence of global warming.

"Last year, following an intensive research effort involving a dozen scientists, I concluded that global warming was real and that the prior estimates of the rate of warming were correct. I'm now going a step further: Humans are almost entirely the cause."...

Full story and access to lot of data, analysis, comment and debate via the BBC report here. Arguably it is because Prof Muller et al had a moderate, practical, pragmatic scepticism that he reasoned that a change of mind was justified by the evidence. Long may moderate, practical, pragmatic scepticism reign.

Wednesday, July 11, 2012

Drugs discussion

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Tory MP Michael Ellis has, as reported in this story, reacted to Danny Kushlik in the way many politicians - across political parties - have reacted on the issue of illegal drugs over many years. Its a shame that he's not more open to new thinking on this matter. Does he not realise that continuing on with more or less the same old, failed attitudes and polices, throwing a lot of - misdirected - money at the problem, is irrational? Politicians need to base their policies on drugs on the evidence, such as this research comparing legal and illegal drugs: http://tinyurl.com/3ao562j

Sunday, May 27, 2012

Steiner and science

28 comments:
A group of parents and teachers have launched a campaign to create a new free school. The Bristol Steiner Free School group announced...that it would bid next February for government approval of the project. Free schools are state-funded but independent of council control and set up in response to demand from groups of parents....[The group said the school would have] a strong academic element, specialising in environmental sciences...The Steiner School movement emerged from the ideas of early 20th century educationalist Rudolf Steiner. (full story).

Steiner (pictured) claimed direct experience of the 'spiritual' world. He was a philosopher, occultist, social reformer, architect, esotericist. and founded Anthroposophy. Anthoposophy claims to investigate the spiritual world and believes it can attain precise and clear conclusions in the same way that science concludes about the physical world.

I've been an active green for 30 yrs and I teach environmental sciences  (which is simply the proper application of scientific methods to the environment). I do not support Steiner's ideas or Steiner Free Schools and would point to the British Humanist Association concerns about them (see http://www.humanism.org.uk/news/view/1042 ).

Like others commenting on this Post report I can’t see how Steiner's ideas are at all consistent with modern science and its methods and so I am as concerned about Steiner Free Schools setting up with public money and support as I am about certain other kinds of Free School with a significant ideology behind them instead of openness, questioning and reason.

Background on Steiner:
http://www.rudolfsteinerweb.com/  and  http://en.wikipedia.org/wiki/Rudolf_Steiner  

Monday, March 26, 2012

Anthropocene Animation

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A 3-minute journey through the last 250 years of our history, from the start of the Industrial Revolution to the Rio+20 Summit. The film charts the growth of humanity into a global force on an equivalent scale to major geological processes. The film was commissioned by the Planet Under Pressure conference, London 26-29 March, a major international conference focusing on solutions. planetunderpressure2012.net  

For more go to anthropocene.info

Carbon Centre

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At last! More serious attention is being given to the accurate measurement of carbon emissions. One might well ask why it's taken so long when our society has been committed  since the late 1980s - in words at least - to sustainable development. Sustainable carbon emissions are the number one performance measure within sustainable development...

A new UK facility aimed at improving measurement of carbon emissions and boosting development of clean technology is due to open. The Centre for Carbon Measurement will be based at the National Physical Laboratory in south-west London. It will raise accuracy of climate data, support better emissions monitoring to ensure a fair carbon market, and verify claims made about low-carbon products...more

Sunday, March 25, 2012

Technology tale

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I'm an advocate of scientific and technological thinking. Many currently define technology far too narrowly though - and most often in terms of applied science, business and commerce. For more effective problem solving and opportunity taking we should be thinking more broadly and making connections - its more creative and more likely to anticipate consequences or potential consequences of actions.

Technology is not just about rational problem solving either, there are political, organisational and psychological dimensions. Technology is the sum total of our practical knowledge and it predates science, industrialisation, capitalism...Its something we need to learn to be more selective and controlled about adopting, through proper, thorough technological assessment processes.

Monday, March 12, 2012

Climate and carbon

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This week is Climate Week. I'm all in favour of raising awareness of climate change and the need for urgent action on a significant scale though I find that many of these sort of initiatives provide more opportunities for greenwash and greenspeak than real, concerted green action. I note that significant contributors to climate change such as Tesco, EDF, H&M...are sponsors of the week!!! I have serious doubts about the policies of Govt, councils and business on carbon reduction and climate change - they are too small scale and too slow and so dont match best science. We are missing out on good, sustainable economic development as a result too. Many approaches dont show joined up thinking eg more products are being marked with their carbon footprint but shoppers dont have any information to tell them what is too high or too low a footprint and there is no requirement for them to stay within a carbon budget in any case. Anyhow, here's a screencast I've made giving an essential guide to carbon footprinting - call it one of  my contributions to the week:

Tuesday, February 28, 2012

Super Science

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Check out this program on the BBC. In the 2012 Richard Dimbleby Lecture, leading geneticist and Nobel laureate Sir Paul Nurse explores the wonder of science and how it enhances our culture and civilisation.

He investigates how science can not only help solve the world's big problems, but also be harnessed to improve health and quality of life.

One of Britain's most eminent scientists, Sir Paul is the president of the Royal Society and chief executive of the UK Centre for Medical Research and Innovation.

Friday, February 24, 2012

Ecology efforts

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Included in some materials on ecology I've been reviewing are Commoner's four laws of ecology. Professor Barry Commoner first stated these in his 1971 book The Closing Circle. They are a great legacy. We still have a lot to learn with respect to them. Sadly we have yet to make them part the core of our decision making in practical terms, though they continue to have a great impact. Here's a screencast summarising Commoner's four laws of ecology, along with a few additional comments on the science and its implications.
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Wednesday, February 08, 2012

Climate: no change

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Climate change is rated as a very serious problem. So why has action not been correspondingly urgent? Here's a screencast I've made exploring this question in terms of: visibility; historical precedent; immediacy; complexity; blame; personal impacts.

Thursday, February 02, 2012

Talking temperatures

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What a load of rubbish in this Bristol Evening Post story! The temperature on a single day in a Bristol WINTER compared with the temperature on a single day in the Antarctic SUMMER (Bristol will be cold as the South Pole tonight - snow forecast for the weekend). Such a lack of care over fair comparison. What would the Post be like with setting a complex set of temperature data in its proper context?

Why not instead give some figures for past extreme high and extreme low temperatures along with the average high and low here in Bristol at this time of year? Record Feb high at Long Ashton +18.3 C, record low in Long Ashton -9.7 C (1959-2002), average high 7.7 C, average low 1.8 C (assuming the table of data here http://en.wikipedia.org/wiki/Bristol  is accurate and reliable). Compared to these averages it is going to be quite a bit colder tonight if we get the - 6 C forecast. Temperatures will vary according to where you are in Bristol, with the outskirts generally a bit colder than further into the city due to the urban heat island effect.

Monday, January 16, 2012

Sound science?

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On badgers the Government and the National Farmers Union state that the scientific evidence backs culling. The Humane Society, The Wildlife Trusts and the Mammal Society amongst others dont think the evidence is there to support a cull. The contrast in views of the scientific evidence is pretty stark eg Environment Secretary Caroline Spelman saying 'We can't escape the fact that the evidence supports the case..' whilst Mark Jones, of Humane Society International UK refers to 'compelling scientific evidence that it will be ineffective...'. See http://www.bbc.co.uk/news/uk-16183926. If there are likely to be 'no end of difficulties', as PM David Cameron said on Countryfile last weekend, is the policy of culling trials a good one?

Why the differences in assessing the science? When can we and do we trust science and scientists? Here's my screencast on some questions to ask on this topic:


  

Friday, January 13, 2012

Happiness humbug?

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This ('Bristol is 'not a happy city' says poll') is really badly reported, though the issue is an interesting one. If 1 in 5 say they are not happy that leaves 4 in 5 that said something else...from neither happy nor not happy through happy to very happy one assumes. So, how is the Post headline justified? We have a few more people in one national survey who said they are not happy, compared the average - but that's not the same as 'not a happy city'. We need more information!


There's also the issue that this is only a snapshot - and is a self-assessment. Don't levels of happiness go up and down somewhat? What is happiness in any case and over what timescale are we talking? And how are happiness levels best assessed?

The story also mixes up happiness and contentment. The two are not the same. Being content is being satisfied, accepting and having desires that are reasonably restrained. Happiness is thought of as being pleased, feeling gladness or joy, though maybe its not so straightforward as this. For more sense than this article and to explore wellbeing as opposed to just happiness and contentment I'd read Martin Seligman's book 'Flourish'.

Seligman interviewed on newsnight http://www.youtube.com/watch?v=Q-Vhjmdp4nI&feature=related

Tuesday, January 10, 2012

Saturday, January 07, 2012

Safe systems?

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The Evening Post headline 'Oldbury deemed safe' is misleading as it makes no sense to declare something 'safe' ie free from risk. This is not what the assessments of UK nuclear power stations have tried to do. What does make sense is to talk about degrees of risk ie the probability occurrence of various hazards. 'No major weaknesses' in UK nuclear stations is not the same as safe - better to say that certain risks have been found to be low probability. The development of life on Earth is thought to be an extremely low probability event - but here we are!

Saturday, December 24, 2011

Efficiency drive

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This sort of energy efficiency and renewable energy scheme (here) is long overdue but whilst the headline is current and active saying 'Ten-year energy efficiency drive will create jobs' the first sentence of the story immediately damps that down, referring to 'council plans to develop' the scheme.

Its good to see this project but £2.5 million over ten years, less than a quarter of a million per year, does not amount to a 'multi-million pound' scheme in my book - unless the council is going to get much more money from a range of other sources (are they?).

Work on 6000 homes and buildings is a decent start but Bristol has hundreds of thousands of homes and buildings, which gives some perspective to this. The 1500 jobs figure sounds more like hope than realism given the amount of money per year mentioned here.

Though the council setting up its own energy company to operate at arms length is a good move I'd ideally like to see many community based energy companies in the city - and I just hope the council is more dynamic than it has proved to be and gets on with it! Having said that they have been and are not helped by central govt policy, so lets see that change for the better.

These developments should be driven by our need for energy security, community resilience and what best science says about the rate at which we need to be cutting fossil fuel use and carbon emissions - if you work back from what they say to the consequent energy efficiency and renewable energy plans you get investment figures that are much higher and orders of magnitude more installations.

Monday, December 19, 2011

Cameron's Christianity?

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More creationist Free Schools planned for 2013 opening

'Cameron's traditional Christian values' to be in action in Bedford, Barnsley...? This from the British Humanist Association:

More Free Schools are being planned for opening in 2013 by creationists or groups with links to a creationist organisation, the British Humanist Association (BHA) has learned. The BHA has concerns about proposals in Bedford and Barnsley, in addition to plans in Sheffield and Newark that the BHA had commented on earlier this year.

In Bedford, Destiny Christian School is being proposed by the Miracle Church of God in Christ, and if approved to open, will be a member school of the Christian Schools’ Trust (CST). At an open meeting attended by a BHA supporter, the group were asked about their policy on creationism and responded that they believe creationism is science and intend to teach it as such.

In Barnsley, the independent Barnsley Christian School is hoping to enter the state sector as a Free School. Like Destiny Christian School and Sheffield Christian Free School, Barnsley Christian School is a member of the CST. The CST is founded by creationist Sylvia Baker, author of Bone of Contention, and while not every CST school advocates creationism, the organisation as a whole has a statement explaining that the organisation is creationist and recommending the teaching of creationism in its member schools.

The BHA has already commented on applications to open a Free School in 2013 by Sheffield Christian Free School and Everyday Champions Church, who are also creationist groups. In November, Everyday Champions Church had a meeting with officials at the Department for Education (DfE) to discuss why their application to open in 2012 was rejected, and their local MP, Patrick Mercer, additionally met privately with Secretary of State for Education Michael Gove to voice his support for the bid.

Other creationist groups have also applied to open Free Schools in the past, without their views on creationism getting public exposure. One example is The King’s School in Nottingham, another CST school that openly teaches creationism in science, also previously applied to open a Free School, both in 2011 and a second time in 2012, though it is unclear if the school intends to apply again in 2013.

BHA Chief Executive Andrew Copson commented, ‘It is easy to see the appeal of Free Schools to certain religious groups, not only because they have freedom to discriminate in employment and admissions but because of the considerable latitude they have over the syllabus taught, which would in practice permit schools to promote religious dogma in place of objective teaching on issues such as creationism. Even more concerning is that so many groups with openly creationist positions believe they have a chance of receiving government approval for their schools to open within the state sector as Free Schools.

‘In supporting and coordinating the ‘
Teach evolution, not creationism!’ position statement, we are calling on the government to make statutory and enforceable the current guidance that creationism and ‘intelligent design’ should not be taught as science in schools, and to ensure that all state-funded schools must teach evolution. Without such measures, the risk that one of these creationist schools will gain approval to become a Free School remains.’

Saturday, December 17, 2011

Cameron's Christianity Codswallop

8 comments:
David Cameron's pronouncements yesterday on Christianity are confused and send out mixed messages. He trumpets that we are a Christian country, when for many practical purposes we are not (see here) - Cameron himself said he was only a vaguely practicing Christian and over half the country said they were non-religious in the latest social attitudes survey! He calls for the revival of traditional Christian values but says he is full of doubts on major theological issues (see here). He's hardly setting a Christian standard is he, so what is he playing at?

His stated idea is that the return of Christian values would help us fight our 'moral collapse'. He's wrong to think that Christianity and the Bible or any other religion and its texts are the basis of our morality. Human beings developed a sense of what is right and wrong long before any formal relgions existed and very likely for evolutionary reasons.

Instead of pronouncing on Christianity his focus should be on effective, practical action to tackle the poor moral standards so evident in politics, policing, banking and financial services, in the media, and in the Christian Church itself. I'm fed up with expenses scandals, police corruption, greedy bankers and business-people, 'mafia-like' newspaper organisations, sexism, homophobia, child abuse scandals...and the advocacy of materialism we've long had from all political colours.

He should be looking at the privileged, influential position of Christianity in the UK and planning to make us a better secular society. He should think through whether the Bible is actually a consistent guide to anything at all. Richard Dawkins says in his book The God Delusion that '...the Bible is not systematically evil but just plain weird, as you would expect of a chaotically cobbled-together anthology of disjointed documents, composed, revised, translated, distorted and 'improved' by hundreds of anonymous authors, editors and copyists, unknown to us and mostly unkown to each other, spanning nine centuries...unfortunately it is this same weird volume that religious zealots hold up to us as the inerrant source of our morals and rules for living.'

David Cameron should recognise that actually his doubt is a good thing. Doubt means you are thinking. It means you are asking questions, not accepting the status quo - seeking change for the better. Doubt helps us break away from unjustifiable traditions. With no evidence for the existence of God - quite the contrary in fact - and no convincing arguments either, why believe? If there is a God why is there so much undeserved suffering in the world eg those homeless, cold, hungry, thirsty, lonely, subject to war, terrorism and crime, in hospital...? As Woody Allen said God 'is an underachiever' !

The 400th anniversary of the King James Bible that prompted David Cameron's comments has its significance of course. This book is a major, if not the major work of English literature. Atheist Richard Dawkins sums this up nicely in The God Delusion, '...the main reason the English Bible needs to be part of our education is that it is a major source book for literary culture. The same applies to the legends of the Greek and Roman gods and we learn about them without being asked to believe in them.'.