68. major impediment to the use of solar-powered products is the cost of solar energy and
# e# C* m/ O, D# K G6 R: D& Lthat, given a choice, consumers would prefer products powered by solar energy over
$ r& A+ }4 t* athose powered by energy derived from coal or oil. On the face of it, this assumption
B4 _5 i( e' Z( c9 zseems acceptable; but it may be that there are other factors besides cost that make solar - n5 R' }: K/ u5 T, ^6 t( S
energy less desirable than other forms of energy.
* \- Z- W! [( G; W0 f0 c6 i3 k In conclusion, this argument is convincing. To strengthen the argument additional
# G& Q8 }! d/ w' s0 q; Mevidence indicating consumer preference for solar-powered products over products
1 }+ U& b+ i$ j$ r, gpowered by conventional forms of energy would be desirable. |
发表于 2012-8-15 21:50:16
