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[lemma=for] □
The need for gravel ( and sand ) also has several components , such as : what are the prospects for future DOT or other projects requiring sand and gravel , how far away are they , what quality of the aggregate is required , what is the quality of the aggregate on the proposed mining site and what is the extent of other sources of the quality required . In addition , systems in the 1-10megawatt class may enable reusable interplanetary transports for cargo ( and perhaps people ) . As for " kevin getting closer to the bush administration , " i 'll tell you what , mike k : first , let 's see the bush administration set some actual metrics for progress ( and not the insipid " we 'll stand down as iraqis stand up " ) and set a withdrawal timetable against those metrics . " Course notes which list some of the evidence for physicalism ( and thus against substance dualism ) . It 's not for everyone ( and it is not a political platform ) but some of the pressures on our system can be alleviated as more people consider the options .