Yet I can see no other way to save the people in the city from certain extinction.

The human race is doomed to certain extinction.

As if it is time to worry about money when Rome faces certain extinction!

"Just tell me what else you can do when you're faced with almost certain extinction."

"We save abandoned dogs from certain extinction and send them to what amounts to dog heaven."

I wasn't sure how good a time Peter had with Barkley, but he saved his species from almost certain extinction.

Not many will involve anything so dramatic as a certain extinction.

So it was better to risk another invasion than to suffer certain extinction of the human species in Xanth by stiflement.

If it falls below that threshold, then there's no way to climb back from certain extinction.

The androids will face almost certain extinction if they return to Vemla.