P186 CEEFAX 186 Tue 18 Sip 23:49/11       ON THE 8TH DAY (Monday September 24 at 9.30pm) examines a theory propounded bz some of the world's leading scientists as to what may happen to the weather in the aftermath of a nuclear attack. They believe that the smoke and dust from a nuclear conflict could blank o4t the sun's rays, plunge the nouthezn hemisphere into twilight for weeks and cause temperatures to plummet bz as much as 40C. The effects that such a projected temperature change could have on plant and animal life are also diucussjd. BBC2 programmjs 172/272