11. But when average temperatures warmed slightly above a critical threshold , the entire butterfly population would suddenly crash. 12. At some point, Jupiter passed a critical threshold and started sucking in gas much faster than the others. 13. Al-Hakim believes U . S . military preparations have passed a critical threshold and now war was likely. 14. Neisser ( 1984 ) uses a different term, he prefers critical threshold , a level that has to be reached. 15. According to a United Nations study, by January 2008, the economic effects of the blockade had reached a critical threshold . 16. When a tipping point-the critical threshold -is reached, a small change in human activity can have long-term consequences on the environment. 17. If the degradation continues beyond a certain tipping point or critical threshold it would lead to eventual extinction for humanity. 18. By January 2008, according to a United Nations study, the economic effects of Israel's blockade on Gaza reached a critical threshold . 19. "It's a matter of getting them there before they reach that critical threshold , before they start going downhill, " he said. 20. These rhythmic changes in membrane potential do not reach the critical threshold and therefore do not result in an action potential.
