> I heard this discussion on PBS and they said that the problem they
> have with wind at this point, to provide energy for a city is that
> when the wind stops blowing, the current stops flowing. So they end up
> having to leave the regular source running as a backup. Not sure if
> that is accurate or not.
That is the case with wind, you need a 100% backup. You may find places
where the wind may blow what seems like constantly but there are calms and
low wind days. For those times you need a backup to handle all anticipated
needs.