Movable insulation can... be used to prevent heat gain. ...[T]he best position ...is outside the glass rather than inside. - Steve Baer

Now that the experts have started this infantile accounting system, which evidently finds us... independent of the sun, solar energy will be admitted only so long as it has been properly collected, stored and transferred.

[W]e would be much better informed if alongside every graph showing our use of oil, coal and uranium there were also an indication or the total energy received from the sun. Since we can't do without it, let's not omit it from our accounts.

When you start experimenting with, say, solar heating by covering collectors with glass or plastic and feeling the warm air blow out of them... well, it’s so exciting that you just get hooked and can’t stop.