Saudi Aramco accounted for more than 4 percent of global emissions, Gazprom clocked over 3 percent and Coal India accounted for roughly 3 percent.
Total global emissions in 2020, including land-use change, were approximately 40 Gt. This means that Australian emissions are approximately 1.2% of global emissions
There are 26 million people in Australia. That 1.2% is obviously all Australian emissions, but let's exaggerate and say that's purely from individuals. That the footprint of all Australian citizens combined was 1.2% of global emissions.
If literally all Australians then brought their personal carbon footprint to 0, it would be a reduction of less than 1/3rd of Saudi Aramco's emissions alone.
From 2016 to 2022, 80 percent of global carbon dioxide emissions were produced by just 57 companies.
But I'm supposed to believe that I, with my ~ 1/26 million of a percent footprint, have an affect. You'll have to try a lot harder to convince me of that.