Steven Milloy Junk Science
Houghton’s assertion that the 1990s was the warmest decade in the last 1,000 years (search) draws out the question, “Why was it so warm 1,000 years ago?”
Since there were no power plants, factories or automobiles back then, that warm period was obviously natural climate change (search). So why should we leap to the conclusion that any 1990s warming is definitely manmade?
Of course, it’s not even clear that any measurable “global warming” has really occurred, much less that it’s human-induced.
Satellite and weather balloon measurements of atmospheric temperatures since the 1970s actually indicate slight cooling to no change. To the extent any significant warming may have occurred during the 20th century, most occurred before 1940, while most greenhouse gas emissions (search) occurred after 1940 -- so there’s no apparent cause-and-effect relationship.
While it’s possible that some human-induced warming may be occurring, Virginia state climatologist Pat Michaels (search) once pointed out in a television debate with Clinton administration eco-czarina Carol Browner: “The fact of the matter is if you look at those temperature records that you keep on citing, you will see that almost all of the warming takes place in the absolute coldest, most miserable air masses in Siberia and northwestern North America … Great. We've warmed Siberia from minus 40 to minus 38. Big deal.”
If the 1990s were unusually warm, we don’t know why. Neither do the global-warming pushers.