To be (I hope) more optimistic, this link is a review of some of the developments in renewables technology likely to appear over the next few years. Its part of a larger booklet prepared for the international all-energy conference in Aberdeen earlier this year. Current Status of Renewables In summary, yes there are technologies but its going to cost a lot to implement enough of them. Also guess which country has installed the most hydropower and is already second in wind power? The answer may surprise some. KP
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