In two minutes and 39 seconds, the incomparable Isaac Asimov [1] explains the greenhouse effect and tells why he has been warning about it for 20 years. Of course, Azimov has been dead almost 20 years (since April 6, 1992); this video (which we found courtesy of Peter Sinclair from Climate Denial Crock of the Week [2]) was recorded in 1989.
How much has changed since [3]. How much, woefully, has not [4].
Links:
[1] http://en.wikipedia.org/wiki/Isaac_Asimov
[2] http://climatecrocks.com/
[3] http://en.wikipedia.org/wiki/File:Instrumental_Temperature_Record_%28NASA%29.svg
[4] http://www.desmogblog.com/2010-climate-bs-year-award
[5] http://www.desmogblog.com/directory/vocabulary/4387
[6] http://www.desmogblog.com/directory/vocabulary/4400
[7] http://www.desmogblog.com/directory/vocabulary/5594
[8] http://www.desmogblog.com/directory/vocabulary/5595
[9] http://www.desmogblog.com/prescient-azimov-offers-warning-grave
