Nobody asks to be born/burdened with life. Nor does anybody procreate for selfless reasons. They don't procreate o keep ourspecies alive, they procreate because THEY want a miniature version of themselves, or because THEY had unprotected sex, accidentally caused s pregnancy and then THEY didn't want an abortion.
The misery, stress, illness and demise that a human being experiences is absolutely the fault of the people who selfishly created that human being.
You are in no position to ever preach/fearmonger about climate change if you create more humans.
Your offspring is not a gift to humanity or a miracle and nobody outside of your family really cares about the existence of your offspring. Putting semen into a body to create a human being is no more magical than putting food into a body to create fecal matter.