Renewable Energy - When Will They Listen?

In this very enlightening Renewable Energy Focus article derived from a speech given by Dieter Holm in Germany, it states that "...Africa could potentially generate 95% of the world's solar thermal and solar electrical energy." AND, in this Mongabay article, a National Academy of Science study reveals that "...wind power could provide for the entire world’s current and future energy needs." When will the 'powers that be' listen??