Michael, I’ll explain like this. It is difficult to know which would be worse; runaway global heating or full scale nuclear war.
I’m not joking or exaggerating. They could kill similar numbers of people, take similar times for Earth to recover from, have similar effects upon civilisation. In fact, greenhouse heating is adding heat to Earth’s biosphere at the rate of four Hiroshima bombs per second.
Now do you understand why I’m going to COP26?