I’m a Scientist. This is What I’ll Fight For.
Jonathan Foley

You claim “Science teaches us ...” several points that science does not teach at all.

Science says Earth would be safer from pollution, resource exploitation, habitat destruction, climate change, and mass extinctions if the least wealthy half of humanity were quickly euthanized. A strong scientific argument could be made that net human suffering would decline.

Morality says it would be horrible.