Gillard is among 10 female heads of state on this year's rankings.
A second term Gillard government wouldn't have the numbers required to pass its legislation.
News Limited CEO John Hartigan called Gillard's comments unjustified and insisted there was no link between News Corp.'s operations in the U.K. and News Limited in Australia.
Abbott today called Gillard's plan a tax that "won't necessarily help the environment," according to a transcript.
Joyce says he hasn't called Gillard QANTAS chief executive Alan Joyce says the airline has not asked Prime Minister Julia Gillard to intervene in the airline's industrial disputes.