Regarding "Energy security: It takes more than drilling" (Opinion, March 29):

Air-defense commanders protect military aircraft by dispersing them, thus lowering the odds of one strike dealing a crippling blow. Financial security experts counsel their clients to hold diversified portfolios, to hedge against losing everything if one company goes under.

So why is the security-conscious Bush administration promoting continued concentration of vital energy resources into infrastructures that make targets for terrorists?

Real energy security comes from producing more out of existing resources, then diversifying into dispersed technologies such as wind turbines, solar generators, and factory micro-turbines. For an energy policy to be truly conservative, it must be based on efficiency and diversification of resources.