Ten years ago it appeared that nuclear power would solve the anticipated energy crisis. Although supplies of uranium fuel were known to be limited and might become exhausted in half a century, the nuclear ower plant has for a long time been favorite project. But work on it has met with grave problems. The fear of possible atomic explosion and the problems of disposing of polluting by-product waste have been slowed down the construction of further nuclear plants. Eventually atomic technology may be able to control these problems, but at present there seems to be a little agreement among atomic scientists about when this can be achieved.