* calamity
  a catastrophe, disaster or serious misfortune causing great loss or damage

* displace
  put or take something or someone out of the usual place
  But it also says that if no action is taken, rising sea levels, heavier floods and more
  intense droughts could displace 200 milion people by the middle of the century

* abate
  to become or make less strong or severe
  The report said unabated climate change would eventually cost the equivalent of
  5 percent and 20 percent of global gross domestic product each year.

* wait-and-see policy
  The report  represents a huge contrast to the U.S. government's wait-and-see policy.

* outweigh
  to be greater than something in value, importance or influence.
  "The benefits of strong, early action considerably outweighs the costs," he says.

* avert
  to prevent (especially danger)
  They are projections of what the risks are and the benefits of averting those risks

* run amok
  rush about violently and out of control
 
* puberty
  in humans and other primates: the onset of sexual maturity, when thesecondary sexual characteristics appear and the reproductive organsbecome functional

* teeter
 
* limbo
  an area between heaven and hell that is believed to be reserved for theunbaptized dead, either children or the righteous who died beforeChrist.