Changes

'''Temperature variability''' in the last century has included the following identifiable periods:

'''[[Temperature]] variability''' in the last [[century]] has included the following identifiable periods:

:Cooling in the 1920s

:Cooling in the 1920s

:Cooling in the 1950s and 1960s and 1970s

:Cooling in the 1950s and 1960s and 1970s

:Warming in the 1980s and 1990s

:Warming in the 1980s and 1990s

:Cooling for the past decade

:Cooling for the past decade [http://www.heartland.org/full/24851/The_Politics_of_Global_Warming.html]

[[category:Global warming]]

[[Category:Earth Sciences]]