75% - 85% of all living species would become extinct.



Dr. S. Dillon Ripley : Wildlife Conservationist
Quoted in Look Magazine’s Earth Day predictions in 1970, Dr. Ripley predicted that in the next 25 years, somewhere between 75% and 85% of all living species would become extinct.


Look Magazine


http://www.abcforums.com/showthread.php?2301-Earth-Day-1970-Predictions