My colleague Simon Jeffery writes that since the problems began at Fukushima many in comments on the live blogs and elsewhere have offered their suggestions for how the reactors could be tackled.
For example, one email from a scientist asked why ice or snow was not being dropped on the Fukushima reactors. It would, he said, deliver more heat absorbing power than water alone and would at least drop straight down from a helicopter.
Simon has set up a blog inviting readers to leave their suggestions. As he says, "not everyone will be a nuclear scientist – but some might".
Leave your suggestions on Simon's blog here.