The G7 leaders’ pledge to eliminate the use of fossil fuels as an energy source by century’s end could be the most significant outcome of the most recent meeting. It also reinforces German host Angela Merkel’s claim to be the “climate chancellor”. As is customary with such pledges, however, the announcement was short on specifics and it’s really not clear how reductions in fossil fuel usage can be achieved. After all, disasters at Chernobyl in 1986 and Fukushima in 2011 have made key G7 members considerably less enthusiastic about nuclear power, one obvious alternative