Environmental impact = (population) multiplied by (per capita impact)

Much has been said about reducing per capita impact, for example renewable technologies, per capita consumption reduction. But NO amount of reduction of per capita impact will save planet Earth from ruin if the human population never stops increasing.

I’m not suggesting draconian population policies. But we must not be afraid to talk about population issues. Earth can sustainably support between one and two billion people. We have at present over six and a half billion people. Australia must not wait for others to move. Australians must at least be courageous enough to talk about stable human populations.

This will involve redesigning economic thinking. Economies must be steady-state and sustainable. Economic growth cannot continue to be the basic goal.

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Australia's population growth is largely due to immigration. Australia should have better measures of how fast we can sustainably grow and limit the numbers of immigrants to ensure we have a managable population.

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