That makes me more comfortable.
at, say 97.5% recovery, (assuming 1 kg per anode), then:
for focus fusion to meet Weinberg’s “age of substitutability”, of ~60 TW globally, or ~7 kW per person,
( http://books.google.ca/books?id=ZaxLsdJ_ABEC )
then only ~ 5000 t beryllium will be needed, replenishing with 125 t/y from ores and other recycling.
descendants will still want to explore the solar system for additional beryllium. but they’ll have more time.
