In article ,
"David W.E. Roberts" writes:
|
| Have you read Ringworld by Larry Niven? Those sunflowers were aggressive!
|
| Not enough trace metal in the potting compost to build the silver
| reflectors, fortunately :-)

Don't be over-confident. Aluminium is widespread in soils, especially
clays, and makes good mirrors.


Regards,
Nick Maclaren.