I would personally go further than that and preserve two thirds of the planet if not more. That was recommended by E.O. Wilson for those of you that know who he is.
"A new map shows where new land protections could complement existing conserved areas.
Earth faces two interrelated crises: accelerating loss of biodiversity and climate change. Both are worsened by human development of natural lands that would otherwise allow species to flourish and would store atmosphere-warming carbon, stabilizing the climate."
https://www.sciencenews.org/article/protecting-half-planet-climate-change-save-species
"A new map shows where new land protections could complement existing conserved areas.
Earth faces two interrelated crises: accelerating loss of biodiversity and climate change. Both are worsened by human development of natural lands that would otherwise allow species to flourish and would store atmosphere-warming carbon, stabilizing the climate."
https://www.sciencenews.org/article/protecting-half-planet-climate-change-save-species