World Population Program Human population trends are a key factor in sustainable development. We study and project how the changing composition of population matters for social, economic and the environmental change and how human health and well-being are being affected. First, it is an agent of change, bringing about many of the environmental, economic, and social changes that continually challenge the sustainability of our current development paths.
The great Amazon rainforest basin was whole and healthy. Maine had just overcitizens and New England had 92, miles of roads. Global deforestation occurs at a rate of 36 football fields per minute. These amazing figures are only a few in a litany of converging ecological, economic and social crises - global warming, melting sea ice, rising gas prices, food and water shortages.
Unfolding in eerie unison, they have finally roused serious concern in the public-at-large. Or, if we can afford it, drive a Prius. These actions will purportedly solve all our problems. Meanwhile, the fundamental cause of these problems is thoroughly and painstakingly ignored.
Each person on the planet naturally wants to survive and achieve prosperity. As such, they aspire to use one heck of a lot of resources and energy - and produce one heck of a lot of waste. And, it all adds up. The Carrying Capacity Network estimates that every American child born today will consume 3.
In the s and s alone there were overnew homes constructed. Meanwhile, the six New England states have added almost 22, miles of roads since - more than enough road to go round-trip from Augusta to Los Angeles. Meanwhile, citizens of developing countries are understandably striving to be like the U.
Think about China, which appears to be advancing economically along the same path as did Japan, South Korea and Taiwan before it. That sounds wonderful, but there is just one problem. By the way, China adds 8. If current fertility rates continue unabated, the projection becomes 12 billion instead.
The only way fertility will fall as much as the United Nations assumes is if governments around the world make the right investments and assure the necessary health care and contraceptives are available to all who want them.
Currently, that is not the case. Some may wonder what the big difference between 9 or 12 billion is.
Same as if you have 9 cents in your pocket or 12 cents. But a billion of anything is an order-of-magnitude many fail to grasp. Remember that if you stacked one billion dollar bills on top of each other, the resulting tower would extend 62 miles upwards into the sky. A stack of 3 billion dollars would reach over miles high.
Having a child creates a fundamental and profound impact on the environment. If a woman of 25 decides to change her lifestyle to live as frugally as possible, giving up her car, not flying, buying local, etc.
If she also decides to have a child, having that child will counter her reduction by the same amount over the course of her lifetime - and that is assuming that the child lives as frugally as its mother.
If the combination of disappearing forests, loss of wildlife species and global climate change are not enough to get you concerned about population size and growth, you may want to consider that the maximum crude oil production across the entire globe may have already peaked - or will very soon.
In world oil production fell from Factoring in ever increasing human population, oil production per capita has dropped from 5.
Without cheap fossil fuels, how are we and future generations going to heat our homes, power our tractors and other machinery, ship our food from thousands of miles away, and get to work and school? Many experts suggest that without a steady supply of cheap fossil fuels, society will only be able to support a long term population much less than its current size.
One way to think about this is to go back in time when we did not depend heavily on fossil fuels. So is that what a sustainable population size is today?
Some will argue that with new alternative energy sources and greater technical efficiencies, New England could ecologically sustain a population larger than 5. Consider that we may well have to grow more of our food locally due to prohibitive transportation costs, and much of our best agricultural lands have already been replaced with sprawl and development.
The solution to most of our problems, environmental or otherwise, is relatively simple.Mostly ignored in the environmental debates about population and consumption is that nearly all the world’s nations agreed to an altogether different approach to the problem of growth 15 years.
If Earth’s current human population growth rate continues, it will double in size in about 50 years. In Year One A.D., the world’s human population is estimated to be right around million.
today, the population has increased 30 fold to about seven billion.
Shmoop Biology explains Population Growth. Part of our Ecology: Organisms and Their Environments Learning Guide. Learning and teaching resource for Population Growth written by PhD students from Stanford, Harvard, Berkeley. Exponential growth can be maintained for an extended length of time only under rigid conditions (Molles, ).The impact of the population on the environment generally increases as a limiting resource that the population relies on decreases.
The Centre of Expertise on Population and Migration is a new research partnership between IIASA's World Population Program and the European Commission's Joint Research Centre that provides science-based knowledge on migration and demography to support EU policy.
B. Population A was experiencing exponential growth and the growth rate was not affected by the availability of resources like space, food, disease, or ability to find mates. Population B was affected by the carrying capacity and this reduced the number of.