Unlike past fluctuations, which occurred over thousands of years, future climatic changes of about the same magnitude are expected to take place over 100 years or less -- a remarkably short time span.
(past fluctuations; occurred; T:over thousands of years, future climatic changes of about the same magnitude are expected to take place over 100 years or less -- a remarkably short time span) (future climatic changes of; are expected; ) (future climatic changes of; to take; place; T:over 100 years or less)
past fluctuations future climatic changes of future climatic changes of
occurred are expected to take
T:over thousands of years, future climatic changes of about the same magnitude are expected to take place over 100 years or less -- a remarkably short time span
place T:over 100 years or less