411 REFERENCE · Wikibooks
Climate Change/Science/Present Climate
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Here we illustrate some important aspects of the current climate. (This should cover not just the late 20th century, but pre-industrial to present climate. )
500px|1880-2009 global mean surface temperature difference relative to the 1961–1990 average