Paul,
Anything that would use up the fuel gets my vote. Leaving something behind  
for future generations to deal with, especially considering the tens of  
thousands of years we're talking about. Hell, our recorded history so far is  just a 
drop in the bucket and we're already stockpiling crap that will be around  
for a long time. How much more damage can we do in the name of technology and  
prosperity. 
Something that needs to be considered at some point and time in the future  
is just how many people can we have on this planet. What number is enough. When 
 will governments limit the populations?
 
Rummy