NPR’s report on permafrost, carbon and human behavior was introduced in the 1990 edition of State of the World. Of course their data originated in the 1980s. We need to change. Now !
https://www.npr.org/sections/goatsandsoda/2018/01/24/575220206/is-there-a-ticking-time-bomb-under-the-arctic?
http://www.worldwatch.org/bookstore/publication/state-world-1990