US president Barack Obama's suggestion that Australia was not doing enough to save the Great Barrier Reef was misinformed and unnecessary, Trade Minister Andrew Robb says.

Mr Obama piled pressure on the Abbott government to act on climate change while in Brisbane for the G20, saying natural wonders like the reef were under direct threat.

US President Barack Obama was among the world leaders whose details were inadvertently emailed to Asian Cup organisers. Credit:Reuters

Foreign Minister Julie Bishop later said her office had sent Mr Obama a briefing on federal government preservation efforts, but stopped short of rebuking him.

Trade Minister Andrew Robb went one step further than his coalition colleague on Sunday.