The only way to safely and responsibly convert from our present energy generating technologies to the new ones we have (and others that will be developed), is to gradually phase the new in and replace the old over a number of years, even decades. If this isn't done with a bit of common sense and an understanding of the social implications of just doing things willy nilly (which is what will happen and is happening), then the consequences will be just a grave as if we did nothing at all. What the pollies and the greenies have to remember is we've been addicted to coal/oil/gas for over a century and we've built a society based on shortsightedness and greed (capitalism and "market" economics). It will most likely take just as long to wean ourselves off it and replace the present system with something else. But, we have to be willing to do so.
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