Colour

[richardw]

Lookit solar tower:
http://www.inhabitat.com/2007/05/21/sevilles-solar-power-tower/
http://en.wikipedia.org/wiki/Solar_updraft_tower

Which refs: "In mid 2008 the Namibian government approved a proposal for the construction of a 400 MW solar chimney called the 'Greentower'. The tower is planned to be 1.5 km tall and 280 m in diameter, and the base will consist of a 37 km2 greenhouse in which cash crops can be grown"

[jack12]

Thanks very interesting, there is always one problem, storing the power. My friend is working on silicon wafers (long story) but in working with silica we found that we can store the heat, run water through it and drive the turbines as we require (more cost effective) In Kaz the wind blows 300 days a year so it is still viable for end of grid connections back feeding into the power grid.