Here is a sobering article that raises serious concerns about the future
prospects for solar energy's competitiveness with other sources of heating.
I searched google and had no maches on subject key words in alt.solar*.
Surprising, since people have figured an average 3% reduction in solar E
striking the earth's surface per decade over the last 50 years. This is
serious loss and does not bode well for photosynthetic plants optimized for
certain energy inputs either.
running Suse 9.0