Alan Finkel is meeting senior international officials in Europe and Asia in a new diplomatic effort ahead of a trio of crunch climate change summits this year.
World leaders will be urged to refocus on climate change during the first major economic summit held since the pandemic began.
The special adviser to UN secretary-general António Guterres on climate action indicated Australia had not met the threshold needed to speak at the key event.
In a lively appearance before a panel of MPs, Abbott also said his job as an adviser to the UK did not conflict with his loyalties as a former Australian prime minister.
The British Prime Minister stressed the need for countries to adopt “ambitious targets” to reach net-zero emissions.