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Wind Turbines and Global Warming

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Windmills have been used for centuries – using wind to turn machinery.  Electricity generation using wind also has a long history, but has only taken off in the last three to five years, now growing 30% a year.   Wind already provides a peak global capacity greater than 100 gigawatts – to compare, the entire UK uses only a peak of 57 gigawatts.

How they work

Large wind turbines cost around £2m to build, the energy they use is free, and they last for at least 20 years.  They pay for themselves in as little as 5 years and then make their owners pure profit.  In 2008 there were already 165 wind farms operating 1,944 turbines in the UK with another 34 bring built, 118 more had planning consent and 220 were being reviewed for planning (British Wind Energy Association).  Turbine efficiency and reliability have greatly improved in the last five years.

Why they matter

Wind power offers huge potential for the future especially in relatively unpopulated and windy nations such as the US.  It only provides around 1% of electricity globally.  Denmark produces 19% of electricity this way, Spain 9%, Ireland 6% and Germany 6%. The current US contribution of wind to electricity is only 1% but this could rise to 15% by 2020.  General Electric is forecasting that half of all new generating capacity in America over the next decade will be wind-powered.  The cost of wind electricity has already fallen to 4p a kilowatt which makes it competitive with natural gas.


Wind power varies from day to day which means it is expensive to use wind for more than a small proportion of total electricity generation.  Many people object to the appearance of wind farms on hills or coastline.  Many wind farms are built in remote places where energy yield can fall significantly for two reasons.  Firstly long roads built for maintenance can use a huge amount of energy in building (1 ton of carbon dioxide per ton of cement).  Secondly, an average of 7% of all power generated in the US or UK is lost in transmission, and the longer the cables, the greater the problem.

Business opportunities

General Electric sells more than $6bn a year of turbines and this is only the beginning.  A single new installation in Texas will soon generate a gigawatt of power – with a capital cost of $2bn.  Subsidies and high electricity prices mean a single UK onshore wind turbine can make £500,000 of pure profit per year.  A farmer can earn £50,000 a year from a quarter of an acre with a single installation – compared to just £150 of bioethanol.

A typical 2 megawatt (2MW) turbine can now generate power worth £200,000 on the wholesale markets - plus another £300,000 of subsidy from taxpayers.  That represents a great financial return if you have planning permission and a small amount of capital.  The market for wind farm equipment and installation could be more than £6bn a year in EU alone - £2bn in UK which is aiming for 20,000 new turbines by 2020.

Expect massive government subsidies around the world, as non-oil producing nations look to reduce oil dependence at same time as solving global warming challenges  US sales of small turbines are likely to exceed 100,000 a year.

Unlike power stations, wind generation can be built piecemeal as needs change and technology improves.  Innovations include flexible blades which bend to spill very strong winds and special composite materials which are strong and light.

Large turbine manufacture is a capital intensive and specialist market.  Single blades can be more than 250 feet long, offering opportunities for local manufacture.  Small turbine production also offers huge opportunities for medium sized business.  Installation and maintenance are great business opportunities for medium and large companies.

There are also huge business opportunities to rebuild national grids using direct current rather than alternating current – better at transporting power long distances from windy hills to cities.

Many more Global Warming Videos by Futurist Dr Patrick Dixon and Sustainagility book.

Articles and Videos on Global Warming

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Thanks for promoting with Facebook LIKE or Tweet. Really interested to read your views. Post below.

Emily Warren
November 22, 2010 - 17:13
How it affect global warming

i was doing a report on global warming for one of my calsses and this site helped,

Reply to Emily Warren
Patrick Dixon
November 12, 2012 - 19:01

Glad you found the global warming article helpful.

Reply to Emily Warren
Patrick Dixon
November 12, 2012 - 19:16

Glad you found the global warming article helpful.

fred micglopin
April 23, 2010 - 14:48

please date your articles so students can use them for research thank you

Reply to fred micglopin
Patrick Dixon
November 12, 2012 - 19:02

Thanks - wrote this global warming and wind power article in October 2012.

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