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Politics : View from the Center and Left -- Ignore unavailable to you. Want to Upgrade?


To: TimF who wrote (62967)5/2/2008 1:11:09 PM
From: Lane3  Read Replies (1) | Respond to of 541946
 
Does it have to last for 50 years, 100 years, 500 years, 10000 years, or until the sun goes red giant, in order to be sustainable?

Seems to me that, in this context, "sustainable" means lasting long enough for something to replace it. At some point surely technology or exploration will produce a replacement.