Currently around the world sun and wind contribute just .6% of world energy total. And that's expected to reach 2.8% by 2030. US energy experts wrote solar off in the 1980s suggesting it would never deliver more than a fraction of their energy needs. They've been proved right despite some continuing research. Germany today presents a very disturbing and confusing picture. Solar subsidies in 2007/8 totaled $4.3 billion US and for just .7% of its electricity.
...Now with wind power the Danish experience is instructive. They have the most expensive power in the EU, have stopped building wind farms, have been unable to reduce their emissions and have now closed five turbine manufacturing plants with a loss of 3000 jobs.