Bee-covered sodomising asteroid: is the use of the term “nuclear winter” here because
i) this has become a real actual science name for any long-term post-explosive atmospheric temperature drop.
ii) this has become a lazy shorthand for any etc etc.
iii) the BBC want to hint that our humble pollinating friends could survive a nuclear war and become masters of the Earth.
iv) the BBC know something we don’t* about the fate of the dinosaurs!
*(unless we have been diligently reading our 2000ADs that is.)