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	<title>Comments on: Ian Roberts: Slim chances for a fat planet</title>
	<atom:link href="http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/feed/" rel="self" type="application/rss+xml" />
	<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/</link>
	<description>Just another blogs.bmj.com weblog</description>
	<pubDate>Tue, 24 Nov 2009 06:02:31 +0000</pubDate>
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		<title>By: Jon Peterson</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2347</link>
		<dc:creator>Jon Peterson</dc:creator>
		<pubDate>Mon, 09 Jun 2008 16:23:03 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2347</guid>
		<description>I'm not entirely convinced of the link between cars and obesity. US per capita calorie intake did not start to rise until the 1980's (http://www.ers.usda.gov/publications/FoodReview/DEC2002/frvol25i3a.pdf), at least a decade or two after widespread car use came to the US. It would seem generally true that the less work people do, the less they need to eat. Accordingly cars should reduce food intake, if indeed (and it's a big if) using a car tends to result in doing less physical work. If on the other hand we take the line that doing less work results in consuming more food, then surely the car is a minor factor. The complete transition of many economies to office based service jobs away from heavy manufacturing is surely far more important. The person who cycles 20 minutes to their office is surely far more indolent than the person who drives 20 minutes to their job stacking shelves in a supermarket.

Yet, it does not seem to be the case that office workers are all obese, and manual workers are lean.

I think people are obese because eating is fun, and the cost of food calories as a percentage of income has been falling. And I think people drive cars because it's useful, and the cost of cars as a percentage of income has been falling.

The notion that people eat more because they do less requires more rigorous analysis, I think.</description>
		<content:encoded><![CDATA[<p>I&#8217;m not entirely convinced of the link between cars and obesity. US per capita calorie intake did not start to rise until the 1980&#8217;s (http://www.ers.usda.gov/publications/FoodReview/DEC2002/frvol25i3a.pdf), at least a decade or two after widespread car use came to the US. It would seem generally true that the less work people do, the less they need to eat. Accordingly cars should reduce food intake, if indeed (and it&#8217;s a big if) using a car tends to result in doing less physical work. If on the other hand we take the line that doing less work results in consuming more food, then surely the car is a minor factor. The complete transition of many economies to office based service jobs away from heavy manufacturing is surely far more important. The person who cycles 20 minutes to their office is surely far more indolent than the person who drives 20 minutes to their job stacking shelves in a supermarket.</p>
<p>Yet, it does not seem to be the case that office workers are all obese, and manual workers are lean.</p>
<p>I think people are obese because eating is fun, and the cost of food calories as a percentage of income has been falling. And I think people drive cars because it&#8217;s useful, and the cost of cars as a percentage of income has been falling.</p>
<p>The notion that people eat more because they do less requires more rigorous analysis, I think.</p>
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		<title>By: vidyadhar date</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2346</link>
		<dc:creator>vidyadhar date</dc:creator>
		<pubDate>Fri, 30 May 2008 10:47:35 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2346</guid>
		<description>excellent  Dr Roberts.  your analysis  is far more sharp than  of transport scholars. i am always impressed by your writing. moreover, it has no jargon.

 best

  vidyadhar date</description>
		<content:encoded><![CDATA[<p>excellent  Dr Roberts.  your analysis  is far more sharp than  of transport scholars. i am always impressed by your writing. moreover, it has no jargon.</p>
<p> best</p>
<p>  vidyadhar date</p>
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		<title>By: GEORGE  CALDWELL</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2344</link>
		<dc:creator>GEORGE  CALDWELL</dc:creator>
		<pubDate>Sat, 10 May 2008 12:25:03 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2344</guid>
		<description>Bio-fuels may be derived from food products but they become a "food substitute".

Are "Ersatz".  Not digested .

These enter the body as TRANS-FATS and probably never leave it.
Don't they remain as obese botties, big titties, etc.?

Better by far to go back to Granny's recipes using Pork Lard, Beef Dripping, Butter and so on. They will get metabolised.

Got enzymes for them, see?  You needn't eat a lot of them.
Those "Veg. Oils",  "Veg. Solids" appear in most Ice Creams and packaged foods in the big supermarkets.

Be warned.</description>
		<content:encoded><![CDATA[<p>Bio-fuels may be derived from food products but they become a &#8220;food substitute&#8221;.</p>
<p>Are &#8220;Ersatz&#8221;.  Not digested .</p>
<p>These enter the body as TRANS-FATS and probably never leave it.<br />
Don&#8217;t they remain as obese botties, big titties, etc.?</p>
<p>Better by far to go back to Granny&#8217;s recipes using Pork Lard, Beef Dripping, Butter and so on. They will get metabolised.</p>
<p>Got enzymes for them, see?  You needn&#8217;t eat a lot of them.<br />
Those &#8220;Veg. Oils&#8221;,  &#8220;Veg. Solids&#8221; appear in most Ice Creams and packaged foods in the big supermarkets.</p>
<p>Be warned.</p>
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		<title>By: Leon Avalos</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2334</link>
		<dc:creator>Leon Avalos</dc:creator>
		<pubDate>Wed, 30 Apr 2008 14:13:27 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2334</guid>
		<description>what is with  these attacks on cars man!!!</description>
		<content:encoded><![CDATA[<p>what is with  these attacks on cars man!!!</p>
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		<title>By: Olive Kobusingye</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2338</link>
		<dc:creator>Olive Kobusingye</dc:creator>
		<pubDate>Wed, 30 Apr 2008 07:17:00 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2338</guid>
		<description>Ian, good to read your thoughts on food and fuel. Maybe the cause is lost for some populations that have been down this path for a long time. But do low income countries have a fighting chance? It is painful though, to know that while most 'poor' people walk out of necessity, they are only helping to coserve fuel so the rich can burn even more. The links between food and fuel are not being often enough, and loud enough. And when the debates happen, they are accompanied by lavish, obcenely fat rich dinners. Olive</description>
		<content:encoded><![CDATA[<p>Ian, good to read your thoughts on food and fuel. Maybe the cause is lost for some populations that have been down this path for a long time. But do low income countries have a fighting chance? It is painful though, to know that while most &#8216;poor&#8217; people walk out of necessity, they are only helping to coserve fuel so the rich can burn even more. The links between food and fuel are not being often enough, and loud enough. And when the debates happen, they are accompanied by lavish, obcenely fat rich dinners. Olive</p>
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		<title>By: Garry Egger</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2337</link>
		<dc:creator>Garry Egger</dc:creator>
		<pubDate>Tue, 29 Apr 2008 23:05:05 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2337</guid>
		<description>Congratulations to Dr Roberts for his bold comments and to the London Shool of Hygience for employing someone with a 'big picture' approach to health. It is about time we had some more intense health input into what John Snow showed in the mid 19th Century - that the broader environment is intimately connected to human health - and increasingly more so in exponentially expanding economic system. With some more input like Professor Roberts', we may also eventually be able to talk publically about the biggest elephant in the room - population control - without which all environmental action is ultimately overwhelmed.</description>
		<content:encoded><![CDATA[<p>Congratulations to Dr Roberts for his bold comments and to the London Shool of Hygience for employing someone with a &#8216;big picture&#8217; approach to health. It is about time we had some more intense health input into what John Snow showed in the mid 19th Century - that the broader environment is intimately connected to human health - and increasingly more so in exponentially expanding economic system. With some more input like Professor Roberts&#8217;, we may also eventually be able to talk publically about the biggest elephant in the room - population control - without which all environmental action is ultimately overwhelmed.</p>
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		<title>By: Peter Savill</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2340</link>
		<dc:creator>Peter Savill</dc:creator>
		<pubDate>Tue, 29 Apr 2008 18:50:58 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2340</guid>
		<description>Yet another attack on cars and those that actually derive pleasure from motoring. Now the motorist can drive around secure in the knowledge that they will become obese as their gas guzzler gently warms the planet causing ecological mayhem. If they are not satisfied with this then they should take heart from the thought of causing global poverty and destitution whilst killing a few pedesterians and cyclists by driving far too fast and recklessly. Perhaps the internal combustion engine should be banned and we can happily skip back to the dark ages. The only problem with that plan would be the urgent need for a new scapegoat for all the worlds ills!</description>
		<content:encoded><![CDATA[<p>Yet another attack on cars and those that actually derive pleasure from motoring. Now the motorist can drive around secure in the knowledge that they will become obese as their gas guzzler gently warms the planet causing ecological mayhem. If they are not satisfied with this then they should take heart from the thought of causing global poverty and destitution whilst killing a few pedesterians and cyclists by driving far too fast and recklessly. Perhaps the internal combustion engine should be banned and we can happily skip back to the dark ages. The only problem with that plan would be the urgent need for a new scapegoat for all the worlds ills!</p>
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		<title>By: Ediriweera Desapriya</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2343</link>
		<dc:creator>Ediriweera Desapriya</dc:creator>
		<pubDate>Tue, 29 Apr 2008 18:32:20 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2343</guid>
		<description>We need to take serious actions to eliminate inhibitors of active life styles in our communities

We certainly need to congratulate Dr. Ian Robert for his thought provoking note. With the growing trend in childhood obesity, the issue of a decline in our children’s level of physical activity is now at the forefront of public health challenges.  As there are many public health benefits to an active life style the rights of pedestrians and cyclists to use roadways safely, both as a means of transport and as a leisure activity, need to be safeguarded in order to increase the pleasure and likeness of walking in our neighborhoods. All road users deserve better and safer road travel.

To promote walking and cycling as an active mode of transportation it is critical to first identify the perceived and real barriers, second, recognize effective strategies and then further develop them to surmount the problems that hinder walking and cycling.  An increase in activity of 30 minutes per day has been proposed as an adequate amount of exercise which would curtail the effects of a higher calorie diet.  This roughly equates to the amount of time a child would normally spent commuting to and from school.  The health benefits of active commuting have been proven in the adult population; one study found that there was a 40% reduction in all cause mortality for men and women who cycle to work. Walking and cycling are two forms of physical activity that meet the metabolic criteria for achieving health benefits from exercise. The consultation document from the Health of the Nation physical activity taskforce concludes that activities of moderate intensity, such as brisk walking and cycling, offer the greatest potential of health gain for most of the population. Efforts to create safe and accessible routes for children to walk and bike to school will create a trickle down effect for people of all ages.

In 1969, approximately half of all schoolchildren walked or bicycled to or from school and 87% of those living within 1 mile of school used active modes of transportation to get there. By contrast, today fewer than 15% of children and adolescents use active modes of transportation.  One recent study in the US explored the question of why children don’t walk to school more often. Parents reported multiple barriers as follows: long distances (55%), traffic danger (40%), weather (24%), crime (18%), and school policy (7%). Similarly, a recent study in the UK showed that 85% of parents were worried about traffic danger on the journey to school.  Traffic dangers, perceived and real, are discouraging parents from allowing children to walk and cycle to school, a trend seen across the globe: in the UK less than half of primary school children walk to school (18) and 50% are driven less than a mile to school, in India children are discouraged from walking or cycling to school due to increased vehicle danger.</description>
		<content:encoded><![CDATA[<p>We need to take serious actions to eliminate inhibitors of active life styles in our communities</p>
<p>We certainly need to congratulate Dr. Ian Robert for his thought provoking note. With the growing trend in childhood obesity, the issue of a decline in our children’s level of physical activity is now at the forefront of public health challenges.  As there are many public health benefits to an active life style the rights of pedestrians and cyclists to use roadways safely, both as a means of transport and as a leisure activity, need to be safeguarded in order to increase the pleasure and likeness of walking in our neighborhoods. All road users deserve better and safer road travel.</p>
<p>To promote walking and cycling as an active mode of transportation it is critical to first identify the perceived and real barriers, second, recognize effective strategies and then further develop them to surmount the problems that hinder walking and cycling.  An increase in activity of 30 minutes per day has been proposed as an adequate amount of exercise which would curtail the effects of a higher calorie diet.  This roughly equates to the amount of time a child would normally spent commuting to and from school.  The health benefits of active commuting have been proven in the adult population; one study found that there was a 40% reduction in all cause mortality for men and women who cycle to work. Walking and cycling are two forms of physical activity that meet the metabolic criteria for achieving health benefits from exercise. The consultation document from the Health of the Nation physical activity taskforce concludes that activities of moderate intensity, such as brisk walking and cycling, offer the greatest potential of health gain for most of the population. Efforts to create safe and accessible routes for children to walk and bike to school will create a trickle down effect for people of all ages.</p>
<p>In 1969, approximately half of all schoolchildren walked or bicycled to or from school and 87% of those living within 1 mile of school used active modes of transportation to get there. By contrast, today fewer than 15% of children and adolescents use active modes of transportation.  One recent study in the US explored the question of why children don’t walk to school more often. Parents reported multiple barriers as follows: long distances (55%), traffic danger (40%), weather (24%), crime (18%), and school policy (7%). Similarly, a recent study in the UK showed that 85% of parents were worried about traffic danger on the journey to school.  Traffic dangers, perceived and real, are discouraging parents from allowing children to walk and cycle to school, a trend seen across the globe: in the UK less than half of primary school children walk to school (18) and 50% are driven less than a mile to school, in India children are discouraged from walking or cycling to school due to increased vehicle danger.</p>
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		<title>By: Gabrielle Gaedecke</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2342</link>
		<dc:creator>Gabrielle Gaedecke</dc:creator>
		<pubDate>Tue, 29 Apr 2008 18:07:17 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2342</guid>
		<description>Did anybody read this (tongue-in-cheek) response by Lawrence Ulrich "Check the Spare : Does Driving Make you Fat?" http://en.autos.sympatico.msn.ca/guides_and_advice/article.aspx?cp-documentid=5581166
I found the viewpoint from the Car-and-Driver columnist most entertaining but also sadly on point. The selfish preoccupation Western society has with its own convenience and efficiency is costing us everything - our environment, our health, and ultimately our future.</description>
		<content:encoded><![CDATA[<p>Did anybody read this (tongue-in-cheek) response by Lawrence Ulrich &#8220;Check the Spare : Does Driving Make you Fat?&#8221; <a href="http://en.autos.sympatico.msn.ca/guides_and_advice/article.aspx?cp-documentid=5581166" rel="nofollow">http://en.autos.sympatico.msn.ca/guides_and_advice/article.aspx?cp-documentid=5581166</a><br />
I found the viewpoint from the Car-and-Driver columnist most entertaining but also sadly on point. The selfish preoccupation Western society has with its own convenience and efficiency is costing us everything - our environment, our health, and ultimately our future.</p>
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		<title>By: Leon Avalos</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2341</link>
		<dc:creator>Leon Avalos</dc:creator>
		<pubDate>Tue, 29 Apr 2008 15:32:24 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2341</guid>
		<description>Yes that is a good idea do not purchase that suv

&lt;a href="http://getcreditsavy.com" rel="nofollow"&gt;&lt;/a&gt;</description>
		<content:encoded><![CDATA[<p>Yes that is a good idea do not purchase that suv</p>
<p><a href="http://getcreditsavy.com" rel="nofollow"></a></p>
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		<title>By: Anna Donald</title>
		<link>http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2335</link>
		<dc:creator>Anna Donald</dc:creator>
		<pubDate>Tue, 29 Apr 2008 02:58:35 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.bmj.com/bmj/2008/04/28/ian-roberts-biofuels-obesity-and-transport-slim-chances-for-a-fat-planet/#comment-2335</guid>
		<description>Thanks Ian for spelling out the nexus between fuel and food so clearly. I hadn't quite realised how blatant it was until your piece. Maybe I won't buy that SUV after all.... :) Take care, Anna</description>
		<content:encoded><![CDATA[<p>Thanks Ian for spelling out the nexus between fuel and food so clearly. I hadn&#8217;t quite realised how blatant it was until your piece. Maybe I won&#8217;t buy that SUV after all&#8230;. <img src='http://blogs.bmj.com/bmj/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> Take care, Anna</p>
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