Peter Dutton’s call for a ban on sports betting ads during live games has overwhelming public support, but an opposition push for nuclear power has fallen flat, as a new poll shows it is the least popular energy source.

A new AFR/Freshwater Strategy poll found 70 per cent of respondents supported a ban on betting advertising for an hour each side of televised sport. Only 13 per cent said they were opposed to the idea, while 17 per cent were undecided.