Electricity can be generated by nuclear fission, hydropower, biomass, wind and solar energy; and cars and lorries can run on electricity or biofuels.

Ahmadinejad, in a speech in the south-eastern province of Kerman, broadcast on state-run television, said: "We have prepared a package that can be the basis to resolve Iran's nuclear problem."

But Mr Noda said Japan should cut its reliance on nuclear energy over the long run. See article.