There are also possibilities of add-on impacts to the human infrastructure.
We think of our society as very robust because we're very powerful.
We have all this industry and the agricultural revolution,
there are more people on the Earth than ever before.
And our might seems infinite.
But if some huge event triggers
mass migration of people, say if Bangladesh floods or the river
valleys in China, which are very low level, become inhabitable,
If you have mass numbers of people in distress,
who are moving, this could be a challenge to civil governance.
You could have failed states, and collapse
of this infrastructure on which we all depend.
I don't know if you've ever tried to grow tomatoes in
a garden, but if you imagine trying to live from
your garden, you realize that, If they didn't put food in
the grocery stores for us, none of us would probably survive.
It's known from history, that
societies do suddenly collapse.
This is also something to worry about.