Population growth is a non-issue in teh context of the state of the planet. It will plateau to about 11-12 billion(ish). What is the issue is economic growth. We are stuck on the need for growth, and that pushes CO2 emissions up, and the other issues, such as habitat loss, and plastic pollution.Whilst the population growth, grows ever faster, the wealthiest countries spend 100's of millions of pounds on fertility treatments.
You could not make it up.
Renewables can't yet keep up with such growth and energy efficiency will only make it worse in the long term.
We need to work out clean sustainable growth (and build lots of nuclear power plants), and measure growth by things other than GDP, that reflect the true cost/balance of the things we value.