solar chimney - one kilometre high

huangyhg

solar chimney - one kilometre high
is this the right place to get up to date information on the solar chimney?
for those who are not familiar with it a sloar chimney has a large green house at the bottom.  the sunlight causes the temperature rises inside the green house forcing the air to escape through the chimney by the buoyancy effect.  by sticking a turbine inside the chimney energy is generated.
australia government has recently approved a scheme to construct a solar chimney for generating about 200mw energy at around a$700 million to be completed in 2005 to 2006.
the stack structures which i am aware of had been built to a current limit of about 350m high.  i hold a personal belief that if this one-kilometre chimney fails its expectation then the structural engineering/economic could be the last straw that breaks the camel's back.
any view from fellow strcutural professionals?