| http://www.w3.org/ns/prov#value | - In the US there was a study done - there is studies done on all sorts of things, some of them are complete nonsense, I love the words 'studies say..' but I think this study is probably accurate - that you could replace about 70% of the passenger miles - in the United States, at least, I do not know how to apply that to Britain - but about 70% of the passenger miles with no change to the grid.
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