| Understanding our world |
| by Science Correspondent Mary Cooper
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| “The Work is going well, but
it looks like the end of the world” Sherwood
F Rowland to his wife, on discovering evidence that chlorofluorocarbons
(CFCs) destroy ozone.
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Can home energy generation help save the planet?
As awareness of climate change grows, people are asking what changes in their personal lifestyles will make a contribution to combating the threats that mankind’s voracious energy usage. For many years insulation and double glazing have been seen as sensible courses of action and more recently consumers have been able to purchase their electricity from suppliers who guarantee that it has been generated from renewable energy sources. But are such steps enough? Voices are now being raised saying that home owners should be considering direct investment in renewable energy sources for their properties both to limit their fossil fuel energy consumption and to protect themselves in the longer term from spiralling energy price increases.
Renewable energy options
Renewable energy comes from environmentally friendly sources that are continuously replenished and won’t run out. For domestic-scale purposes there are a range of options for generating your own heat or electrical power which can meet a range of budgets and situations. Sources can include the Sun (solar power), wind power, and water in the form of rivers or streams (hydro power). Wood fuel (or biomass) is also classed as renewable energy, along with heat pumps (either ground or air source).
Choosing a renewable energy source
Finding information on renewable energy and making sense of it has been a significant problem for home owners in the past, as the technical issues can be complex. An independent website www.GreenEnergy360.org, which has been developed in association with experts from Loughborough University, cuts through these problems by providing a ‘one-stop-shop’ for high quality information. It also contains a unique and simple 3 step survey to ascertain the best renewable energy for your home. Asking simple questions about your property and its energy profile, the survey analyses the most appropriate renewable energy system for your needs, gives an idea of the capital cost and returns from the technology, and details the carbon saving that can be made from the project. A key advantage of the www.GreenEnergy360.org web site is that it enables you to get a good picture of your needs from an expert and reliable independent source before engaging with installers. Once you have identified the possibilities and issues you can then be referred to reliable installers from the site knowing exactly what it is that you are looking for.
Ursula Dickenson from Staffordshire installed solar hot water panels on her home in 2007 and is very positive about her experience. “It’s too early to tell what the cost savings will be. We’re not too bothered about how long it takes to get our money back – although we know we will,” she says. “The collector temperature can register 80 degrees while the outside temperature is only 14 or 15 degrees. I wish that governments would look at the economics of building nuclear power stations versus helping householders to invest in renewable energy.” She would whole-heartedly recommend anyone to investigate ecological ways of running their home: “It’s an entirely positive experience.” she says, “With the right help and knowledge you can make a huge difference to your personal satisfaction and to helping our planet.”
Simon Calvert
www.GreenEnergy360.org
What causes global warming?
What is the greenhouse
effect?

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Earth is sometimes referred to as the “Goldilocks
Planet”. It is neither too hot like Venus, nor too cold like
Mars, but just right for life to thrive. The temperature on Earth
comes from a balance between energy from the Sun and energy reflected
back into space. The greenhouse effect is a natural one, and carbon
dioxide can have a useful role as it absorbs heat and gently warms
the Earth. However the anthropogenic (manmade) impact comes from
pumping extra carbon dioxide into the atmosphere from burning fossil
fuels for energy and clearing forests. This causes global warming.
The fastest growing source of carbon dioxide is from aviation.
In the UK the main sources of carbon dioxide comes from heating
our homes and from transport. Internationally, America emits the
most carbon dioxide.
Carbon Dioxide is not the only gas that contributes to global warming.
Methane is a hundred times more power in its warming effect. Much
of it is trapped in deep ocean deposits and in permafrost in parts
of the world like Siberia and Alaska. The scary bit is the interaction
between the two gases. If rapidly increasing concentrations of carbon
dioxide lead to warming, the permafrost will start melting, which
is already happening, potentially releasing millions of tonnes of
methane, causing more warming, causing more permafrost to melt.
A positive feedback loop is created. The icecaps start melting rapidly,
and their white surface is replaced with one which absorbs more
heat. A tipping point of no return may be reached within the next
ten years, where we have left it too late to do anything to preserve
an environment that will support life. It’s not good news,
but don’t say you weren’t warned!
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Science Links
Climate Hot Map - Early warning signs
United Nations Environment Programme Arendal, Norway
Country by country greenhouse gas emission graphs
NASA's Global Change Master Directory (GCMD)
Carbon Disclosure Project
Atmosphere, Climate and Environment Information Programme
Providing descriptions of Earth science data sets and services relevant to global change research
G.A.I.A – The Green Advice and Information Agency (G.A.I.A)
Goddard Institute for Space Studies
The Global warming Debate
Bureau of Meteorology, Australia
Evidence for climate change and the greenhouse effect
Climate Ark.org
Climate change & renewable energy portal
Department of the Environment/...
Children's guide to global warming
US Government Global Change Research Programme
Greentie: Greenhouse Gas Technology Information Exchange
BBC News/... 'Sceptics denounce climate science 'lie''
vision.net.au/~daly/
- 'Still Waiting for Greenhouse' - a sceptical view of the evidence for global warming
Republicans for Environmental Protection
'Facts and Myths about Global Warming: A Conservative Perspective'
Washington Post
U.S. Environmental Protection Agency - global warming site
New Scientist.com/... Global Pollution trends
Climate.org The Climate Institute - an international network of experts and alliances seeking to promote discussion and to influence political and business leaders on issues surrounding climate change
ClimateCare.org
Intergovernmental Panel on Climate Change
Founded by the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP) in 1988 in recognition of the potential for global climate change
BBC.co.uk/climate change
the evidence, impact and politics of climate change
Guardian.co.uk/global warming/
Manchester Metropolitan University/...
Manchester Metropolitan University - Encyclopaedia of the Atmospheric Environment a one-stop source of information on a range of atmospheric issues, including air quality, acid rain, global warming and ozone depletion.
Nulear Power Fact Sheet
Southampton University/...
The effects of global warming
Wikipedia feature on renewable energy
WWF - Climate Change Campaign
European Environment Agency/.../Climate Change
Earth from Space
Google Earth
Pictures of Planet Earth
Earth Pictures
Earth Viewer
NASA
Digital Earth
3D Earth
Satellite Images of Earth
Exploring Earth
Visit The Green Network
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