
Whither global warming?: As scientists debate the findings, what are we supposed to do? Image from NOAA.
Discussions of global warming almost always include some allusion to “scientific consensus” – the idea that many / most / almost all scientists agree that the warming is real, is caused by humans, and/or will have catastrophic effects on the planet.
There have always been two problems with this:
- “Consensus,” while a wonderful thing in politics, is meaningless is science. It doesn’t matter how many people agree with a statement; all that matters is whether or not the statement can be verified by independent observation or experimentation.
- The “consensus” is not as universal as has sometimes been presented. Scientific studies that proclaim “we’re all doomed!” naturally get a lot more attention than those that say “everything is normal.” Unfortunately, this imbalance of attention has led some people to conclude that the scientific argument is one-sided, when this is far from the case.
Yesterday The Hudson Institute issued a press release counting 500 peer-reviewed scientific papers disputing some aspect of the global warming hypothesis. According to the report,
More than 300 of the scientists found evidence that 1) a natural moderate 1,500-year climate cycle has produced more than a dozen global warmings similar to ours since the last Ice Age and/or that 2) our Modern Warming is linked strongly to variations in the sun's irradiance. … Other researchers found evidence that 3) sea levels are failing to rise importantly; 4) that our storms and droughts are becoming fewer and milder with this warming as they did during previous global warmings; 5) that human deaths will be reduced with warming because cold kills twice as many people as heat; and 6) that corals, trees, birds, mammals, and butterflies are adapting well to the routine reality of changing climate.
What is The Hudson Institute?
Let’s not mince words: The Hudson Institute is not a scientific organization. It is a political think-tank; it supports conservative policies; and it receives funding from some major corporations. It is easy to imagine they simply reviewed thousands of published reports and simply picked the ones that happened to fit their world-view.
(Of course, Al Gore is not a scientist either; he has a liberal political agenda; and he gets money from political contributions. What’s more, the Clinton-Gore administration funded many of the reports he now uses to support his global warming hypotheses.)
None of that matters, though. The Hudson Institute isn’t claiming to have done any original scientific research. They are simply pointing to research that has already been done by other scientists which dispute some aspects of global warming, and thus undermine claims to “consensus.”
So, where do we go from here?
Danish scientist Bjorn Lomborg has a new book out called Cool It: The Skeptical Environmentalist’s Guide to Global Warming He has recently been interviewed by both the New York Times and the Wall Street Journal. Lomborg believes that global warming is indeed caused by human activity. But he argues that the dangers have been over-hyped, and that “Anti-warming policies (like those of the Kyoto Protocol) that require energy taxes or other checks on economic dynamism are inefficient and even harmful.” For example:
Mr. Lomborg cites studies showing that by implementing Kyoto--at a cost of trillions of dollars--we might be able to achieve a 3% reduction in fluvial and coastal flooding damages. If we instead adopted smart flood policies--e.g., an end to public subsidies that encourage people to settle in flood plains, a shrewder use of levees--we could achieve a 91% reduction in damages at a fraction of the Kyoto cost.
So, if global warming demands a response, it must be a clear-headed one – both scientifically (using all the information at our disposal, and not creating an artificial “consensus”) and socially (making rational decisions based on costs and benefits). As the Journal article notes, “[r]ather than governments imposing costly energy taxes to little benefit, Mr. Lomborg argues, they should fund research programs aimed at finding breakthrough technologies.”
* Tip of the hat to Douglas Adams
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