CONTROVERSIAL shock jock Alan Jones has been ordered to undergo ''factual accuracy'' training, and to use fact-checkers, in another damaging blow to his credibility.

External trainers will conduct training sessions for Jones and other news and current affairs staff at 2GB. But their task could be a challenging one, with many leading journalism academics having been involved in the online ''Destroy the Joint'' campaign against Jones. That campaign led to droves of advertisers abandoning the show in the wake of Jones' offensive comments about the Prime Minister in relation to her late father.

The Australian Communications and Media Authority yesterday released a damning report on Jones' show, finding he breached broadcast rules by falsely claiming Australians contributed just ''1 per cent of .001 per cent of carbon dioxide in the air''.

''The percentage of man-made carbon dioxide Australia produces is 1 per cent of .001 per cent of carbon dioxide in the air,'' Jones told his listeners on March 15 last year. ''Nature produces nearly all the carbon dioxide in the air.''