Archive for the ‘Science’ Category.

Food Nazis Get Fact-Checked

Apparently, the mortality rates from obesity that the media has been breathlessly lecturing us with were overestimated by at least 1500%:

But in a study released this week by the CDC
and published in the Journal of the American Medical Association ("Excess Deaths
Associated with Underweight, Overweight, and Obesity"), the public health
community has finally owned up to their massive fib by acknowledging that the
number of deaths due to obesity in the US is closer to 26,000 not 400,000 as
previously reported.

The part of the earlier study that really got people's attention was the fact that even those slightly overweight but well short of obese had a significantly increased risk of death.  Now, the CDC channels Emily Littella in saying "never mind":

for the merely overweight with BMI's from 25-30 there is no excess mortality. In
fact, being overweight was "associated with a slight reduction in mortality
relative to the normal weight category." Being overweight not only does not lead
to premature death, something that dozens of other studies from around the world
have been saying for the last 30 years, but it also carries less risk from
premature death than being "normal" weight. In other words the overweight=early death "fact" proclaimed
by the public health community is simply not true.

In fact, the study argues, the risks from being underweight are greater than overweight, something that resonates with me having known two women who died due to complications from anorexia.

Other studies will have to replicate these findings, but this study does seem to have taken a more careful approach than previous approaches.  One thing you can be sure about, is that this will not stop lawsuits against fast food companies, since overwhelming medical evidence of the safety of breast implants has not stopped litigation in that arena.  Heck, the fact that most people who are suing asbestos companies admits they are not even sick has not stopped litigation in that arena.

 

9/11 Conspiracies

Popular Mechanics has a very readable debunking of many of the most prevalent 9/11 conspiracies.  I am sure conspiracy theorists will generally respond to most of the scientists quoted with the all-encompassing "they're in on it!"  Once you get so many people giving evidence that the conspiracies are incorrect, you drive the conspiracy into the realm of Meyer's Law:

When the same set of facts can be explained equally well by

  1. A massive conspiracy coordinated without a single leak between hundreds or even thousands of people    -OR -
  2. Sustained stupidity, ignorance and/or incompetence

Assume stupidity.

In this case, the word stupidity is unfair.  The 9/11 attacks fall into the category of the "unimagined".  Frank Borman (as portrayed in the awesome mini-series "From the Earth to the Moon", I have not been able to find out if they used his actual words) is speaking to a committee hearing on the Apollo 1 fire that killed three astronauts.  Under intense scrutiny for a set of conditions that in retrospect seemed ridiculously unsafe, Borman described the problem as "a failure of imagination". 

In this case, for example, conspiracy theorists ask why no military plane intercepted the aircraft.  First, I would argue that without any prior precedent, no military commander or politician would have the cajones to shoot down a planeload of innocents on a commercial airliner (now THAT would be conspiracy fodder, had it happened).  Second, though, the article quotes a number of military commanders to say that the US didn't really have the radar coverage or aircraft patrols in place to intercept an airplane attacking from within the country - everyone previously imagined the threat to come from outside our borders, and that is how our defenses were arrayed.

Anyway, read the who article - it is an entertaining roundup of conspiracy theories (people do have good imaginations) and a well-argued debunking of them.  (via Instapundit)

More Fun with Statistics

I didn't really pay much attention to the typical 24-hour partisan finger-pointing flurry accompanying the stats showing an uptick in US infant mortality rates.  However, looking back on it, it is a good lesson about how statistics are routinely misused in this country (via Captain's Quarters).  Critics of the administration and the health care system used the statistics to try to show something is wrong with the US. 

Two weeks ago, Nicholas Kristof wrote a column on the first increase in the American infant-mortality rate in decades, taking the opportunity to excoriate Americans and the Bush administration as uncaring and unresponsive to the deaths of children. He compared the US unfavorably with Cuba and China

Unfortunately, this conclusion was flawed:

babies that would die in the womb or at stillbirth elsewhere are born alive in the US. Many of these survive completely, but because of their precarious state, they tend to die at higher percentages than normal births. That's why the numbers rose slightly for 2002. The CDC doesn't expect to see another increase like it.

The solution might be to look at the survival rate at year one as a percentage of total pregnancies, not just births (though you would have to exclude abortions).

Zooms from Space

I find these NASA animated zooms from space down to a single building or landmark to be totally addictive.

Iceberg Collision

Courtesy of Nature Noted, comes this article on two enormous blocks of ice set to collide in the next week in Antarctica.

104274main_iceberg_story_pic

As the Nasa site linked above puts it:

It is an event so large that the best seat in the house is in space: a massive iceberg is on a collision course with a floating glacier near the McMurdo Research Station in Antarctica. NASA satellites have witnessed the 100-mile-long B-15A iceberg moving steadily towards the Drygalski Ice Tongue. Though the iceberg's pace has slowed in recent days, NASA scientists expect a collision to occur no later than January 15, 2005.

Tsunami Before and After Part 2

Best laid plans.... I try to run a small business and economics blog and 90% of the hits I have gotten over the last 2 days have been on Tsunami before and after pictures.  OK, well, I have have been updating the original before and after post with links to people who really are blogging the tsunami and its aftermath.  Nature has some amazing before-after satellite shots, including these, which are wider angle views of the original shots I posted:

Beforeafter1a_1 Tsunamibeforeafter1b_1

These shots are chilling, and help explain the death toll better than any single photos I have seen:

Tsunamibeforeafter2a Tsunamibeforeafter2b

Makes me think of Atlantis.  Hat tip to the Nature site to Marginal Revolution.

For more before and after images, look here and  here and here (in this last link see the powerpoint download in the lower left).  This site has a ton of tsunami blog links, including pictures and video.  Here is a link-filled roundup (new 1/4) and an older one here, and another here.  And here is a dedicated blogHere is a 1/5 roundup of Indian blog posts about the tsunami and its aftermath.  And here is a local blog with news.  And here is the Amazon Red Cross donation page.

Update:  A more recent roundup as of 1/11 here.

Tsunami Before and After Part 2

Best laid plans.... I try to run a small business and economics blog and 90% of the hits I have gotten over the last 2 days have been on Tsunami before and after pictures.  OK, well, I have have been updating the original before and after post with links to people who really are blogging the tsunami and its aftermath.  Nature has some amazing before-after satellite shots, including these, which are wider angle views of the original shots I posted:

Beforeafter1a_1 Tsunamibeforeafter1b_1

These shots are chilling, and help explain the death toll better than any single photos I have seen:

Tsunamibeforeafter2a Tsunamibeforeafter2b

Makes me think of Atlantis.  Hat tip to the Nature site to Marginal Revolution.

For more before and after images, look here and  here and here (in this last link see the powerpoint download in the lower left).  This site has a ton of tsunami blog links, including pictures and video.  Here is a link-filled roundup (new 1/4) and an older one here, and another here.  And here is a dedicated blogHere is a 1/5 roundup of Indian blog posts about the tsunami and its aftermath.  And here is a local blog with news.  And here is the Amazon Red Cross donation page.

Update:  A more recent roundup as of 1/11 here.

Bad Journalism about Science

I have mentioned on a number of occasions that journalists seldom get science stories right.  Most journalists have no science background (if they were good at math and science, they would not have been journalism majors) and they and their employers have huge biases towards spinning every science story as an end-of-the-world disaster.  I remember when I lived in St. Louis we used to say that the local TV stations accurately forecasted 12 of the last 4 blizzards.

Here is a good story and analysis from Satblog analyzing one of the news stories popping us saying that we in the US are all at risk from 100 foot tsunamis or whatever.  The blog calls a recent Dallas Morning News front page story about a tsunami that could wipe out all of Florida

a great example of the crap that passes for science reporting these days, and demonstrates a fundamental misunderstanding of the scientific process.

The Story Behind the Clear Skies Initiative

Via the Commons, the story of how the Clear Skies initiative came off the rails, despite the fact it was initially seen as a win-win for both environmentalists and industry.  I don't know all the issues on the table, but I like the cap-and-trade concept for pollution control. 

Many folks, by the way, automatically assume that as a libertarian, I am automatically against pollution laws.  This is not the case.  In fact, this issue is a good example of how a thoughtful understanding of individual rights and property rights differs from just being blindly "pro-business".  In fact, pollution laws are nearly essential to strong property rights.  As I wrote then:

In fact, environmental laws are as critical to a nation with strong property rights as is contract law. Why? Imagine a world without any environmental legislation but with strong property rights. What happens when the first molecule of smoke from my iron furnace or from my farm tractor crosses over on to your land. I have violated your property rights, have I not, by sending unwanted substances onto your land, into your water, or into your airspace. To stop me, you might sue me. And so might the next guy downwind, etc. We would end up in an economic gridlock with everyone slapping injunctions on each other. Since economic activity is almost impossible without impacting surrounding property owners, at least in small ways, we need a framework for setting out maximums for this impact - e.g., environmental legislation.

Cap and trade strike me as the best, most free market way to limit pollution - this system shifts the burden of pollution control to the people and industries and technologies that can do it the cheapest.  Unfortunately, many environmentalists are command and control technocrats and/or socialists who greatly prefer having government micro-manage technology choices and industry by industry requirements.  Which is exactly what led to the problems referred to in the article around "new source review".

New source review is long and complicated, but basically says that existing power plants don't have to upgrade to new technologies, but new ones have to go through a very extensive environmental review and permitting process and have a suite of government mandated pollution control technologies installed.  OK, that has all been clear for 3+ decades.  The rub comes when a company considers upgrading or replacing a portion of a power plant.  For most of the life of the Clean Air Act, the government allowed utilities to upgrade and modernize plants without having to install the expensive suite of new controls.  The Clinton administration clamped down on this, making it harder to upgrade existing plants.  All the recent hullabaloo has occurred as GWB proposed to go back to the pre-Clinton rules.

This issue is a great test for environmentalists, because it separates them into those who really understand the issues and the science and legitimately want improvement, and those who care more about symbolism and politics.  Those who like symbolism have cast this move as a roll-back, and are fighting it tooth and nail.  Those who care about results know the following:

Experience under the Clinton rules has shown that most old plants will never be upgraded if they have to go through the planning process and install the new scrubbing and other technologies.  So, they will just keep running inefficiently, as-is, until they are finally shut down.  However, if allowed to be upgraded without review and new scrubbers, etc., they will become much more efficient.  No, they won't have the most modern scrubbing technology, but because they are more efficient, they burn less fuel (coal) to make the same amount of electricity and therefore will pollute less.  In some cases these rules even prevent switching to cleaner fuels like natural gas. 

In other words, most scientists, including scientific-oriented environmentalists, agree that GWB's proposal will result in less pollution, but environmentalists still oppose it because they don't like the symbolism of any pollution regulation appearing to be rolled back.  You can read a lot more about New Source Review and how it actually increases pollution in practice here.

Tsunami Before and After

A whole peninsula, wiped clean.  Ugly.  Thanks to LGF for the link.

Beforeafter

Update:  The wider angle view of these photos are even more dramatic - note the new bay where there used to be farms:

Beforeafter1a  Tsunamibeforeafter1b

More of these side-by-side tsunami before-after photo pairs are here.

Update #2:  We are getting a lot of Google hits on this.  For more before and after images, look here and  here and here (in this last link see the powerpoint download in the lower left).  This site has a ton of tsunami blog links, including pictures and video.  Here is a link-filled roundup (new 1/4) and an older one here, and another here.  And here is a dedicated blogHere is a 1/5 roundup of Indian blog posts about the tsunami and its aftermath.  And here is a local blog with news.  And here is the Amazon Red Cross donation page.

Global Warming and Poverty

Several days ago in this post I made the point that the only connection between the recent tsunami deaths and global warming I could find was that 3rd world poverty, which global warming treaties will likely help lock in place, made people more vulnerable to the disaster.  Kendra Okonski makes a similar point in the Asian Wall Street Journal.  Note:

Appropriate infrastructure, including warning systems that can save lives, communications systems, transportation infrastructure, medical facilities, and sophisticated construction methods are the tangible benefits of economic development. Just look at the much lower death tolls when tsunamis strike Japan, where the average citizen is 43 times wealthier than his counterparts in countries such as Indonesia, and so much better placed to afford the infrastructure needed to minimize loss of life.

He goes on to point out how focus on the focus on global warming, combined with growth destroying treaties like Kyoto as well as a hodge-podge of other statist policies will conspire to keep many people locked in poverty:

This week's tragedy illustrates why environmentalists' proposals are preposterous and counterproductive. Policies such as the Kyoto Protocol -- a global treaty to limit emissions in industrialized countries -- would in fact harm the poor the most, by slowing economic growth and distracting attention from real and present problems.

So, in conclusion

The real problem for most of the people affected by the disaster is poverty. Whatever the earth, or its climate, may have in store in the next few decades, the best strategy to minimize human deaths and suffering is to tackle poverty through economic development and technological progress.

UPDATE:  More here at Cafe Hayek

This Was Inevitable - Environmentalists Try To Blame Tsunami on Global Warming

Global warming advocates are already trying to make hay from the recent tsunami disaster (via Reuters, who else)

"Global Warming, Pollution Add to Coastal Threats"

Creeping rise in sea levels tied to global warming, pollution and damage to coral reefs may make coastlines even more vulnerable to disasters like tsunamis or storms in future, experts said on Monday.

Of course it says "may...in the future", but advocates want you to believe that the death toll is due in part to global warming.  Forget of course that the world has yet to see any rises in ocean level (presumably due to melting ice somewhere) or that the basic disaster mechanism of earthquake causing tidal wave has nothing, zero, nada to do with climate.

The argument that clearing mangrove swamps may make a tsunami worse may or may not be true to some extent, but this is only a secondary effect.  The primary, by far, human activity that affected the death toll is the desire by humans to live on the coast.  Unless you want to change this (and I would bet that a disproportionate number of the world's environmentalists make this same personal choice to live on the coast) it does not really matter if there are mangroves or not.

Ironically, the primary way to avoid such disasters is not by reversing human technology (as global warming activists want to do), but by increasing it, in the form of warning systems and evacuation routes.  Global warming advocates actually want to keep everyone poor - they blame wealth and progress for global warming, but note that wealthy countries like the US (the global warming great Satan) has had the technology and the wealth to afford to put systems in place that would have prevented such a huge death toll.  Wealth, prosperity and technology are what would have averted this disaster, and it is just these things that global warming advocates oppose for Southeast Asia.  So here is my alternate headline and first paragraph:

"Poverty, Lack of Technology add to Coastal Threats"

The creeping influence of global warming advocates and treaties that are limiting 3rd world growth and prosperity may make coastlines even more vulnerable to disasters like tsunamis or storms in future, experts said on Monday.

Is Global Warming Advocacy Killing Science?

I worry that global warming advocacy has crossed the line from science to religion, such that data counter to the basic mantra is considered heresy rather than scientific discourse. 

In my review of Michael Crichton's new book, I said I was sympathetic to his global warming skepticism but that I thought his characters and plot were over the top and he was too heavy handed with the polemic, which hurts any action novel.  Maybe I was wrong:

We have to offer up scary scenarios, make simplified, dramatic statements, and make little mention of any doubts we have. Each of us has to decide what the right balance is between being effective and being honest.

- National Center for Atmospheric Research (NOAA) researcher and global warming action promoter, Steven Schneider

More here from Arizona Watch.  I do disagree a bit with using the Nature Conservancy as a proxy for all environmental groups.  Though they advocate things I don't agree with, the vast majority of their funds go to actual preservation rather than political advocacy (unlike Sierra Club or others).  They are actually one of the better examples of trying to use private voluntary action rather than the government to reach some environmental goals.

I have written more on Kyoto here.  A good recent article in TCS by George Taylor talking about the panic around arctic temperatures is here.

Bjorn Lomborg on Global Warming

OK, I am not trying to make this the global warming blog, so hopefully this will be it on the climate posts for a while, but Bjorn Lomborg, perhaps the most disliked scientist in the world for his critiques of many environmental arguments, makes the argument that global warming is a fact, but stopping it may be more expensive than it is worth.

Junk Science's "10 Most Embarrassing Moments of 2004"

If you have never checked out JunkScience.com, you should.  They do a nice job of providing balance and fact-based analysis for many science "stories" in the media, particularly those where the science is driven by political correctness or a litigation and/or political agenda.  The spend a lot of time on global warming, mainly because there is just so much bad science there to criticize, but they range all over, from the latest food Nazi threats to the latest chemical contamination panic.

Last week, they release their 10 most embarrassing moments of 2004.  One example:

10. University of Arkansas researchers attacked the Atkins Diet in January with a report linking a high-carbohydrate diet with weight loss, saying it was possible to lose weight without cutting calories and without exercising. What they didn't reveal, however, was that the study subjects who lost weight actually ate 400-600 calories per day less than those who didn't lose weight.

Never, ever, ever trust a science story in the press.  The press has no idea how to use or manipulate data (if they had been able to do math, they would not have been journalism majors in the first place).  The press generally publishes science stories by cribbing 95% of the story from activists press releases.  Even when there is data in the story, rather than just bald unsupported declarations, it is either seriously flawed, or more humorously, contradicts the text of the story.

I can't resist supporting this statement with a couple of examples from JunkScience.com.

This is a temperature chart for Central Park, NY.  It gets a lot of play in the press as a "common sense" proof of global warming, and comes right off the NASA climate site:

Cenpark_com

Now, lets ignore the fact that urbanization could be causing a local temperature increase that does not reflect a general climate trend.  Lets, however, select our time frame a little differently.  Lets take the whole data set, which goes back further, rather than this set chosen by activists to make their point.  The same data over a longer trend looks like this:

Cent_park_3_1

OOPS!  Gee, I am not sure Central Park looks much warmer.  In fact, you could argue it is cooler.  Hmmmm.  Ask yourself if you really think it was an accident that the year with the single lowest temperature in the middle of the second graph was used as the starting point for the first.

OK, one other, because I can't resist.  There is some debate (though perhaps not enough) about what temperature data set to use - ground level readings, satellite data, balloons, etc.  It might not stun you to learn that out of 3-5 alternative temperature data sets, global warming activists choose not the middle or the average but the single set (ground temperatures) that show by far the most warming to date.  By coincidence, this data set is perhaps the least reliable, since it never has had anything like 100% area coverage, it is subject to the most human error, and it is influenced by urban warming effects. 

However, if you want to use ground data, certainly the most reliable is data for the United States, where data has been taken over a larger coverage area for more time with more consistent standards than any other location.  Global Warming activists will love to show this chart of US temperatures since about 1978:

Ustemp2

Wow, that looks bad - looks like a nearly one degree Celsius rise in less than 25 years.  This is the "hockey stick" climatologists refer to.  Let's leave aside that this same rise is not visible in satellite data or other measurement approaches.  Like the NYC data, lets take a longer time span.  Can you guess why this chart begins in 1978? 

Ustemp

So we are not even at the high's for the last 100 years - those occured in the 1930's  (you remember - drought, dust bowl, etc?)

OK, that's just a taste - check out their web site for more.  In addition, you can read my post on the Kyoto treaty to find other skeptics of global warming, as well as some specific information about how Kyoto is more an anti-American treaty than an environmental treaty.

UPDATE

Based on some responses I have gotten, its probably best that I point out that the reason for posting the charts above was not to "disprove" global warming.  It was to just make the point that you need to be careful with any science you see in the media.  If you look here or here, you will see where I am on global warming, which basically that manmade warming probably exists but is being overstated for a variety of reasons.  In fact, my whole point here is really that you CAN'T prove or disprove something as complex, chaotic, and poorly understood as climate change with 2 or 3 charts.