Damage from methane adds to pressure for carbon levy

Superpower Institute chair Rod Sims wants better reporting of methane emissions in Australia. (Lukas Coch/AAP PHOTOS)

Australia needs a carbon tax to pay for change as the nation is vastly underestimating methane emissions and damaging any climate credibility, former competition tsar Rod Sims warns.

Australia may be emitting at least twice the level of methane emissions than reported under a national reporting framework, according to results released on Tuesday from a new monitoring tool.