26ft 'Wind Tree' uses tiny silent blades to generate electricity from light breezes
The 'Wind Tree' uses tiny blades housed in the 'leaves' that turn in breezes 
A French firm is installing the first model at Place de la Concorde in Paris
'Aeroleaves' generate electricity in wind speeds as low as 4.5mph (7km/h)
This can provide enough power to supply 15 street lamps or one electrical car for 10,168 miles (1,360km) over the course of a year
Mailonline webgunetik hartutako berria eta irudiak. 
Monstrous, 
noisy conventional wind turbines may soon be a thing of the past thanks 
to tree-shaped wind turbines being installed in Paris.
What started out as a concept is now being turned into reality, with several being planned for the French capital.
French
 company 'New Wind' is installing the first at Place de la Concorde in 
Paris and is hoping to expand throughout the country and abroad.
 
The 26ft (8 metre) trees are fitted with 63 aeroleaves. 
Each
 one uses tiny blades inside the 'leaves' and can generate electricity 
in wind speeds as low as 4.5mph (7km/h), and regardless of the wind's 
direction.
A light breeze is classified as having a wind speed of between 4mph and 7mph on the Beaufort Scale.
The
 company's founder, Jérôme Michaud-Larivière, hopes the trees can be 
used to exploit small air currents flowing along buildings and streets, 
and could eventually be installed in people's backgardens and urban 
centres.
The power output of the tree is 3.1 kilowatts a year depending on the wind. 
The trees are also silent, so sound pollution would not be an issue - a major improvement from past designs.
 
The trees currently retail at £23,500 ($33,670). 
'The
 idea came to me in a square where I saw the leaves tremble when there 
was not a breath of air,' said Jérôme Michaud-Larivière, the founder of 
the Parisian start-up. 
Last
 year, after three years of research, the team of engineers developed a 
prototype and installed it in the Pleumeur-Bodou commune in Brittany in 
northwestern France
Mr Michaud-Lariviere said the tree is profitable after winds of 7.8mph (12.5km/h) on average over one year.
He
 admits there are more consistent winds 160ft in the air but they 
require 'monstrous machines', far from where energy is consumed, he 
added. 
In
 the future Mr Michaud-Larivière hopes to develop a 'perfect tree that 
has leaves with natural fibres, roots that could generate geothermal 
energy and 'bark' covered with photosensitive cells.
However,
 Robert Bellini an engineering expert at the Environment and Energy 
Management Agency (ADEME), said the potential of small wind turbines in 
the city remains 'quite low'.

WIND TREES' POWER OUTPUT
The 26ft  trees are fitted with aeroleaves. 
Tiny
 blades inside the 'leaves' can generate electricity in wind speeds as 
low as 4.5mph (7km/h), and regardless of the wind's direction.
A light breeze is classified as having a wind speed of between 4mph and 7mph on the Beaufort Scale. 
The
 power output of the tree is 3.1 kilowatts with the potential to 
generate 3,500 kWh to 13,500 kWh a year depending on the wind speed and 
the location of the tree.  
This
 could provide enough power to supply 15 street lamps, 83 per cent of 
the electrical consumption of a typical family household or one 
electrical car for 10,168 miles (1,360km) over the course of a year. 
An
 average onshore wind turbine with a capacity can produce more than 6 
million kWh in a year - enough to supply 1,500 average EU households 
with electricity. 
 
