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Hans Rosling

Director, Gapminder Foundation


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Why do so many think that population growth is an important issue for the environment? Don't they know the facts of demographics?

We face many environmental challenges, but the foremost is the risk for a severe climate change due to CO2 emissions from fossil fuels.

I meet so many that think population growth is a major problem in regard to climate change. But the number of children born per year in the world has stopped growing since 1990. The total number of children below 15 years of age in the world are now relatively stable around 2 billion. The populations with an increasing amount of children born are fully compensated by other populations with a decreasing number of children born. A final increase of 2 billion people is expected until the world population peaks at about 9 billion in 2050. But the increase with 2 billion is comprised by already existing persons growing up to become adults, and old people like me (+60 years). So when I hear people saying that population growth has to be stopped before reaching 9 billion, I get really scared, because the only way to achieve that is by killing.

So the addition of another 2 billion in number constitutes a final increase of less than 30%, and it is inevitable. Beyond 2050 the world population may start to decrease if women across the world will have, on average, less than 2 children. But that decrease will be slow.

So the fact is that we have to plan for a common life on Earth with 7-9 billion fellow human beings, and the environmental challenge must be met by a more effective use of energy and a much more green production of energy.

The only thing that can change this is if the last 1-2 poorest billion do not get access to school, electricity, basic health services and family planning. Only if the horror of poverty remains will we become more than 9 billion.

So my question is: Are these facts known? If not, why?

It is important because placing emphasis on population diverts attention from what has to be done to limit the climate crisis.


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    Mar 12 2011: I believe that at this point the fact that we have a major problem regarding population and environmental sustainability is known. However, the facts often aren't conveyed in a manner that reaches out to the general population in an effective way. Not only are exact statistics often not shared enough, those statistics are not shared in a way that will touch people instead of computers. To make a real difference the facts need to be shown in a way that is not overwhelming and will demonstrate how the issue at hand pertains to individuals, not just the world as a whole. For this reason, the work of Gapminder Foundation is so important. If the correct statistics can get out in the correct manner more often, then change will be made more rapidly.

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