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If you want to make an impact in the fight against climate change you can do
so by actively supporting wind power!
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Why wind power?
| Why should we worry about climate change?
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In the last few years a lot of people have taken up solar power by putting
photovoltaic panels on their roofs.
Many have done so because they saw it as a good financial proposition,
but many were also at least partly motivated by a desire to do something
toward reducing global warming and limiting climate change.
They felt some responsibility to personally 'do their bit'; perhaps
they saw it as a duty toward giving their children or grandchildren a future.
The average roof-top solar power system in Australia in 2011 was about 2.7 kilowatts (figures from the Australian Renewable Energy Regulator) and an installation of this size will generate about 4.3 megawatt-hours of electricity each year. A typical 3 megawatt wind turbine will generate about 9200 megawatt-hours each year, as much as 2000 roof-top solar power systems! (The working for these calculations is shown on the right. See the glossary for an explanation of capacity factor.) So while putting a solar power systems on your roof is a step in the right direction, providing support to a wind-power company that wants to put wind turbines on our hills is a step that is a couple of thousand times bigger. Wind farms repay the energy used to build them in around the first six months of operation, after that they just sit there and generate clean electricity. Wind power displaces fossil-fuel powerSouth Australia's first major wind farm was built in 2003. By 2014, an average of about 33% of South Australia's electricity was being generated by wind turbines which release no carbon dioxide into the atmosphere while generating. Had these wind farms not been built new fossil-fuel-fired power stations would have been built instead. SA's wind turbines have resulted in a reduction in greenhouse gas production from generation of electricity.It has been calculated that about 3.4 million MWh of electricity were generated by SA's wind turbines in 2011. Since the wind-generated electricity mostly replaced coal, we can say that this would have reduced greenhouse gas emissions from electrical generation by roughly 3.4 million tonnes. Fossil fuel power stationsNot only do coal-fired power station produce climate changing CO2, they also produce particulate matter, sulphur dioxide and oxides of nitrogen; all of which cause serious and undisputed health problems in a great many people. The toxic heavy metal mercury is also released into the atmosphere.Gas-fired power stations release about half the CO2 (per MWh of electricity) that coal stations produce and they also release nitrogen oxides into the atmosphere. (See USA EPA.) Another problem with natural gas is called 'fugitive emissions'. This is the leakage of the methane, which forms the largest part of natural gas, into the atmosphere at any stage from extraction to end use. Methane is a much more active greenhouse gas than is CO2. |
"If climate change drives temperatures up a few degrees," goes the common
dismissal, "how bad could that be?"
In a word, catastrophic!
Some effects of climate change...
My pages on climate change in the international context and in the Australian context discuss the subject in more depth. |
Abatement of greenhouse CO2
The graph on the right shows total electricity generated on the Australian National Electricity Market (that is, the interconnected grid that covers the settled areas of the five eastern states) and the emissions from that power generation. While some of the abatement would be due to the installation of solar power on many of Australia's homes, the majority must be attributed to the development of wind power.
Also see The benefits of wind power,
CO2 abatement from wind
turbines and
CO2 and wind
farms elsewhere.
Catchy, simplistic, but true"A wind turbine operating for three hours reduces CO2 emissions as much as taking one car off the roads for a year." "A wind turbine generates as much emissions-free electricity as about 2000 typical roof-top solar PV installations." The above statements apply to utility scale wind turbines (about 3MW) operating in mainland Australia. (Also see wind farm images with a message.) |
Health concernsCoal power causes illness and wind power replaces coalThere is no doubt that burning coal to generate electricity causes millions of deaths and even more serious illnesses world-wide through air pollution each year. While most of the deaths are in developing countries such as China and India, the regions in Australia where there are coal-fired power stations are also known for their health problems. The Hunter Valley in NSW and the Latrobe Valley in Victoria are examples.On top of the illnesses and deaths routinely caused in the Latrobe Valley, the Hazelwood coal mine fire that burned for 45 days in early 2014 has been blamed for an additional eleven deaths from air pollution. The record in South Australia shows that wind power can replace coal power. While coal kills millions of people each year there is no evidence that wind turbines harm anyone's health
It is notable that very few of the landowners who profit from wind farms on their property have any health problems from the turbines. (Wind farm opponents explain this by saying that they are under gag orders on the contracts that they signed. In fact the confidentiality applies only to the contract itself, not to any health effects.) Wind farm workers, likewise, do not suffer adverse health effects. This point was made by the CFMEU (Construction, Forestry, Mining and Energy Union) in their submission to the recent Senate inquiry into 'The Social and Economic Impact of Rural Wind Farms'. Sarah Laurie, Medical Director of the Waubra Foundation (WF), has many stories of people who are convinced that they have been made ill by wind turbines. She has no evidence that the illnesses were caused by the turbines rather than by anxiety or other causes. She cannot say what it is that is coming from wind turbines that could possibly make people ill. By 2018 very few were taking Ms Laurie's claims seriously any more, especially since the value of her evidence has been discredited in several court cases and since the Waubra Foundation has been making more and more ridiculous claims. Clinical psychologist, Dr Sarah Edelman, has provided a far more convincing explanation for these cases, and more recently Fiona Crichton has collaborated in several very informative papers on the subject. In 2017 Emeritus Professor Simon Chapman and Fiona Crichton had a book published on the subject – "Wind turbine syndrome : a communicated disease". The Waubra Foundation itself, while claiming to be independent, is closely linked to the Australian Landscape Guardians (ALG), a vociferous anti-wind-power group. The Waubra Foundation has the same address as the ALG! The Chairman of the Waubra Foundation is chairman and/or director of a number of fossil fuel, mining, and uranium exploration companies. In its turn, the ALG has links with the right-wing pro-nuclear Institute of Public Affairs. (See an interesting and revealing exposé of these links by Sandi Keane on the Independent Australia site.) Are there medical doctors who hold views contrary to those of Sarah Laurie?Very much so; see Doctors for the Environment Australia and research by Professor Garry Wittert, head of the School of Medicine at Adelaide University. Simon Chapman, now Emeritus Professor of Public Health and previously Director Research of the School of Public Health of the University of Sydney has also been vocal in discrediting claims that wind turbines harm health. |
Health problems without wind farmsIf we do not change to sustainable energy, including wind power, the alternative (since there is not enough uranium in the world to replace fossil fuels with nuclear power) is to stay with burning fossil fuels with the resulting ocean acidification and unrestrained climate change, which has been called "the biggest global health threat of the 21st century" in a recent issue of the prestigious medical science journal, The Lancet.The proven health problems relating to the burning of fossil fuels (especially coal, bunkering oil used for shipping, and diesel oil) are far worse than any that are claimed to be caused by wind turbines. Not only do coal-fired power station produce climate changing CO2, they also produce particulate matter, sulphur dioxide and oxides of nitrogen; all of which cause serious and undisputed health problems in a great many people. They also release the toxic heavy metal mercury into the atmosphere. The World Health Organisation (WHO) has estimated that air pollution kills around seven million people each year. Wikipedia, Environmental effects of coal burning, states that "Coal-fired power plants shorten nearly 24 000 lives a year in the United States, including 2 800 from lung cancer".
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NoiseThe sound level about 100 m from a wind turbine is about 55 dB. I have measured it myself many times. This is the same level of sound as you will hear from a car travelling at 65 km/h 100 m away from you. You can carry out a conversation without raising your voice at all (the sound level of a normal conversation is about 60 dB). At 350 m from a wind turbine you can expect the sound level to be 35-45 dB. Normally sound decreases by 6 dB every time the distance is doubled.The greatest distance I've ever heard wind turbines from is about 2.5km (correction, on 2013/07/07 I managed to just hear some turbines 3.0km away), and then only in a light breeze. In a strong breeze the noise made in nearby shrubs and trees drowns out the turbine sounds. If there were any cars within a kilometre or two of me their noise made it impossible for me to hear the turbines. (I have heard it claimed that sound levels of up to 100 dB have been measured 3 km from wind turbines. Such readings can only be explained as being due to someone not familiar with sound meters allowing the wind to blow over the microphone.) The best thing you can do to learn the facts on the sound levels from wind turbines is to visit a wind farm yourself. (More on noise and wind turbines elsewhere.) |
Land valuesThere have been a number of studies of the effect of nearby wind farms on land values (I have written in greater detail on the subject elsewhere). While there can be a small drop in the value of land near wind farms when they are proposed and during construction, the findings were generally that nearby wind farms do not lower land values in the long term. Of course land with turbines on it will significantly increase in value along with its earning potential. |
Advantages of having a nearby wind farmA wind farm, Clements Gap, was built within 15 km of my home several years ago. It brought:
So far as I know, it harmed no one. There is every reason to expect the same boost to the local community from any proposed wind farm. A bonus to local people who value their environment, want to see climate change and ocean acidification limited and want their grandchildren to have a future, is that they can see these graceful giants working toward that any time the wind blows. |
Relevance to AustraliaAustralia's per-capita rate of greenhouse gas production is the highest of any developed country in the world. The only countries that are worse than Australia are a few poor nations that are ravaging their forests and several Middle-Eastern oil nations that have oil to burn. We generate a lot of our electricity by the dirtiest of all methods: by burning coal. Australia has a moral responsibility to reduce its greenhouse gas emissions.Contrary to many politically motivated claims, Australia is in no danger of 'going it alone' in attempting to reduce greenhouse emissions. Most European countries are well ahead, and developing countries like India and China are working hard to develop clean energy. It is true that China is building many coal-fired power stations. It is also true that China is building far more wind turbines than any other nation on earth, and that China's per capita greenhouse gas production is way below that of Australia. |
Visual amenity
Wind farms are built where they are most financially viable. If local people stop them being built anywhere near houses or towns it is quite possible that they will not be built at all, because of the cost of building too far from power transmission lines, or because they will generate less electricity in areas where the winds are not suitable. Finally, is your view more important than your children's futures and the future of the world? |
Turbines in relation to farming and grazing
Most importantly the land-leasing payments to turbine-hosting farmers or graziers are a very important source of regular income. Reasonable concern has been expressed about the effects of wind turbines on aerial agricultural operations such as crop spraying, fertiliser application and mouse bating on prime agricultural land, but these issues – like so many relating to wind farms – have been exaggerated. They are discussed on another page on this site; as is fire hazard and fire fighting. Wind turbines provide shadeWind turbines are often an important source of shade for livestock in the summer, as shown on the photo below. Many places in Australia have been over-cleared of trees, sheep and cattle will seek the shade of wind turbines in hot weather. Lack of shade provision is a common failing in animal rights in Australia.
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What can you do?If a person who had not previously made any particular effort to minimise his or her greenhouse impact was to try really hard he might, by changing his life-style, installing solar power and solar water heating, and making his house more energy efficient, reduce the amount of carbon dioxide (CO2) he was responsible for by perhaps ten tonnes a year.The same person, if he tried hard and was very successful in convincing other people to do as he had done, might have a part in saving a hundred tonnes of CO2 a year. If same person, by influencing public opinion, managed to get one more moderate sized wind farm built than would otherwise have been built, would have played an important part in a project that reduces CO2 emissions by two hundred thousand tonnes a year. The opinions of the general public, councillors, state and federal politicians are very important in determining whether or not wind farms, and other sustainable energy projects, are built. Many lies and half-truths are spread by climate change deniers and wind power opponents. You could contact your state and federal political representatives, talk to your local councillors, write letters to newspapers, and use social media like Facebook and Twitter to give people the facts about how wind power can make a big impact on our nation's greenhouse gas emissions. Use these pages and those that are listed in my links page to get the facts about wind power. Contact me if you think that I can help you, my email address is near the top of this page. |
Supreme principle of ethicsIn his 'History of Western Philosophy' Bertrand Russell wrote of a 'supreme principle of ethics'. I don't know that he ever actually defined this principle, but it is a very interesting concept.The philosophical discipline of ethics is all about the question of how we should balance our own needs and wants with those of others. Most thinking people would agree that ethical behaviour involves modifying one's own demands if they unreasonably interfere with the needs of others. (Another page on this site, Selfishness or altruism, deals with this point.) A relatively minor example of selfish behaviour is the loud exhaust systems that some people like to have on their cars – they place their enjoyment of the sound ahead of the annoyance they cause to all those people who have to live with the noisier environment. If the annoyance to others outweighs the enjoyment, then the act is unethical. (I will not discuss how to balance personal enjoyment with annoyance of others here, a very relevant part of ethics is utilitarianism.) So, we have an ethical responsibility to consider the needs of those close to us, but what of those further away? A thousand years or more ago, when most of the moral codes of the world's great religions were being developed, the actions of individual people had little effect on anyone but their near neighbours. With the coming of industrialisation and globalisation that has changed; the actions of everyone, in what and how much we consume, how much water we use and what we do with our waste water, how we dispose of our rubbish, how much greenhouse gasses we emit, what chemicals we use and how we use them, what plants, animals, or diseases we spread from one country to another – all these things can effect other people, and not just those close to us. Of relevance to the present subject is the question of how much carbon dioxide we are responsible for releasing into the atmosphere and how it affects other people. We know that the carbon dioxide that mankind is releasing into the atmosphere is causing climate change, ocean acidification, ocean warming and sea level rise. The air pollution from the burning of fossil fuels kills millions of people world wide each year. We therefore have an ethical responsibility to minimise the amount of pollutants that we cause to be released into the atmosphere. It is also reasonable to expect those who place most carbon dioxide into the atmosphere to make a greater effort than other people. Australians, per-capita, are responsible for more than the people of most other nations. That, then is what ethics is about. What about 'the supreme principle of ethics'? I suggest that this involves not only considering how we interact with those near to us, nor even how we interact with people on the other side of the world, but how we interact with all of life on the planet. Climate change will affect all of life on earth. "The question is not, Can they reason? nor Can they talk?, but Can they suffer?" (Jeremy Bentham, 1748-1832; on discussing whether animals should have rights as people have rights.) Can micro-organisms suffer? Is extinction suffering? I certainly think that humanity has no ethical right to cause extinction of other species. |
Related pagesOn this siteWhy I support the local wind farmExternal sitesTop 10 reasons why Americans support wind farms;Wind Energy; Australian Clean Energy Council; Advantages and Challenges of Wind Energy; US Office of Energy Efficiency and Renewable Energy. Wind farm objectors are in a small minority. In a piece published in The Conversation; 2018/05/02; 1,700 people living near 250 wind farms across 34 US states were asked how they felt about being close to turbines. The majority of people within 5 miles (8 km) and even within half a mile (800 m) of a wind turbine were positive about it; only 8% within five miles and 25% within half a mile were negative. |
On a lighter noteThere is nothing like a proposed wind farm to turn people who previously didn't give a damn about anything environmental into keen environmentalists. Suddenly people who don't want the wind farm are concerned for the preservation of every stick of remnant vegetation, all the locally endangered species, native grasses, and particularly every individual bird.This has to be another good reason to build (or at least propose building) a wind farm, the more environmentalists the better! |
ConclusionIf you support the development of wind power then you have a good chance of achieving something significant in the fight against climate change. Around 75% of Australians support the idea of sustainable energy and wind power, but very few are active supporters. It seems to be human nature to be more vocal in opposing something perceived as bad rather than supporting something seen as good.If you oppose the construction of a local wind farm you are harming your children's future by slowing the adoption of sustainable energy. The alternative to sustainable energy is unsustainable energy, climate change and ocean acidification. It's as simple as that. I've written another page on this site about why I support a wind farm proposed near my home. |