Is the increasing use of solar and wind energy causing blackouts around the world? Well perhaps so, at least according to growing numbers of energy experts. Evidence of this, they say, can be seen in Australia, where recently some 90,000 homes experienced a major blackout, the fifth such time over the last six months. Another recent instance occurred in Belgium, where thousands were left in the dark and placed on high security after the electric grid went down. As both countries continue to use more and more renewable energy, experts say the likelihood of their electricity clicking on and off again should not be shocking.