QUESTIONS

Q : In the Sixties there was a U.S. sci-fi series called The Invaders starring Roy Thinnes. What became of him? Glyn Owen, Cardiff. Q : Is it true that more than 90 per cent of the pollution caused by a car in its lifetime is created during its manufacture? John Colbert, Walsall, W. Mids. Q : Did the U.S. consider dropping a nuclear bomb during the Vietnam war? Dr Prem Ohri, Bangor, Gwynedd.