Showing posts with label Population growth. Show all posts
Showing posts with label Population growth. Show all posts

Saturday, July 17, 2010

Hybrid cars will not save us, less population will.



We are often told that one major consequence of industrialization and modernity is the resulting climate change and its deleterious effects. We are further told that if we value planet earth then we should avoid all the activities that result in a major reallocation of carbon in the world. Note that based on the first law of thermodynamics no element is ever destroyed, all what we can do is to release carbon from being locked in fossil fuels to be released as a gaseous compound in the atmosphere. Is such a minute reallocation important for the planet? If we are to recall that this planet has been hit by a meteorite travelling at a tremendous speed, has experienced a cooling process and has a tremendous capacity to adapt and heal itself. In the words of James Lovelock the earth is a “homeostatic super organism” that will constantly change and adapt as to ensure its survival. So does the planet care about our reallocating carbon or any other element for that matter? Physics and common sense tells us that the answer is an unequivocal no. But that does not mean that climate change is not the biggest challenge that humans have ever been faced with. The operative word in the previous sentence is human.

In order to fashion a real and meaningful solution to any problem requires a clear understanding of what is the problem all about. Climate change is not about maintaining a carbon balance for the sake of the earth but it is a purely anthropocentric concern about life for the human species. No one can deny that human civilization has evolved to become an evolutionary factor. A major by product of human activity is climate change which will result in putting into motion a process that many ecologists are calling the sixth extinction. Climate change combined with the growing needs for more roads, buildings, deforestation have radically changed the nature and characteristics of the habitat and thus is leading to more and more extinction.

If we do value these changes, and we should value them, then the solution is not to develop an alternative to the internal combustion engine, although that is desirable, but what is required is a recognition that the biggest threat to human civilization and biodiversity as we know it is the human species itself. The threat is not purely that of numbers, although numbers do count but it is a combination of numbers and levels of affluence. The expression I= PAT as developed by Paul Ehrlich emphasizes clearly the relationship between environmental degradation (I), pure number of humans (P), lifestyles (A) and the level of technology (T). Note that if we are to constantly seek a higher level of affluence, for a larger and larger population then the inevitable outcome is greater and greater ecological degradation.



There are a number of studies that show conclusively that the planet is already beyond its carrying capacity. A popular and easy to understand measure is the estimate of how many global acres are required to provide a particular life style. Such estimates vary from one country to the other and from one household to the other. A simple back of the envelope application of the above shows that if a Western life style is to be adopted by the 7 billion inhabitants then the resources of six planets will be required.

Sustainability is everyone’s concern, large countries, small countries, poor countries and rich countries. Since sustainability does not recognize artificial political boundaries then it must be dealt with on a global level and coordinated policies. Yale University in cooperation with Columbia University have developed a rather sophisticated Sustainability Index based on 76 variables and 21 indicators that shows a weak relationship between GDP and Sustainability Index of each of the 146 countries sin the study. For example, three of the top ten most sustainable countries are not OECD member (Uruguay, Guyana and Argentina). Other rankings that are of interest: Japan is the 30th while the US is the 45th and the UK is the 65th.

Tuesday, February 02, 2010

Government and Fertility.



One does not need to be a Neo Malthusian to recognize that there comes a point when human population growth becomes highly undesirable to say the lease. If the projected 10 billion humans by 2050 are not enough then what is? Is it another doubling to 20 billion or maybe a further doubling still to 40 billion?

Most, and possibly all, of those that have looked into this issue and investigated the potential limits seriously have concluded that we are already beyond any metric of sustainability. This only means that we have overshoot the carrying capacity of the ecosystem and as a result we have to take measures that will reverse our current course.

But what is it that needs to be done if we are to reduce fertility substantially? Surely we cannot stand by as idle spectators and hope that the humans will decide to change their behaviour drastically just because that is good for the ecosystem? Had this been the case then they would have done so a long time ago. So what we are left with is the absolute certainty that human population must stop growing and preferably even start to decline.

If it is deemed to be too risky to count on a voluntary change in behaviour then the only other alternative to reduce the rate of fertility would be a direct and sustained government policy aimed at achieving lower fertility rates. There are a number of actions that the government can adopt that will act to internalize the negative externality of high fertility such as taxes, social expenditures and even outright strict limits on the number of successful pregnancies per female.

What do you think does the government have the right to interfere or should it just stand by and watch?