The number of people globally reached 1 billion in 1800, and then 2 billion in 1925, the report said. Within the last half century, the population boomed to just less than 7 billion from 3 billion. By 2050, the population will reach 9.3 billion, and 97 percent of the growth will be in less developed regions.
Medical advances, more effective vaccines, antibiotics and improvements in public-health conditions has boosted life expectancy in developing countries, where most of the population growth is taking place, according to the UN data reported July 29, 2011 in the journal Science.
● Science 29 July 2011 examines the opportunities and challenges created by demographic changes around the world. journal Science "Population and Development" Science 29 July 2011: Vol. 333 no. 6042 p. 499
“Projections of population size, growth rates, and age distribution, although extending to distant horizons, shape policies today for the economy, environment, and government programs such as public pensions and health care. The projections can lead to costly policy adjustments, which in turn can cause political and economic turmoil. The United Nations projects global population to grow from about 7 billion today to 9.3 billion in 2050 and 10.1 billion in 2100, while the Old Age Dependency Ratio doubles by 2050 and triples by 2100.”
“All population projections are uncertain, as they are entirely dependent on assumptions about the future—for instance, how many children a woman will have 20 or 30 years hence. In that sense, the numbers in these graphics compiled by Science can be considered best scientific guesses, not destiny. What's more, the further out one looks, the cloudier these projections become. Still, population projections offer a window into what the world might look like in 2050.”
There are two major increasing influences on human (anthropomorphic) greenhouse gases (GHG): increased populations and increased gross domestic product (GDP).
Increased human GHGs increase natural GHGs. It is the combined natural and human GHGs that form a carbon dioxide equivalent (CO2eq) that produces global warming temperature increase.
A new peer-reviewed report released week of July 11, 2011, by the Economics and Equity for the Environment (E3) network found that each ton of carbon dioxide (CO2) emitted in the atmosphere results in as much as $893 in economic damages, far greater than the government's current "social cost of carbon" estimate of $21 per ton.
With increased carbon dioxide equivalent (CO2eq), Earth’s temperature increases to a human race terminal point:
+6.4°C: Most of human life terminated (prior to 2099)
The sudden release of large amounts of natural gas from methane clathrate deposits in runaway climate change could be a cause of past, future, and present climate changes. Warming seas lead to the release of methane clathrates trapped in sub-oceanic sediments: methane fireballs tear across the sky, causing further warming. The oceans lose their oxygen and turn stagnant, releasing poisonous hydrogen sulphide gas and destroying the ozone layer. Deserts extend almost to the Arctic. "Hypercanes" (hurricanes of unimaginable ferocity) circumnavigate the globe, causing flash floods, which strip the land of soil. Humanity reduced to a few survivors eking out a living in polar refuges. Most of life on Earth snuffed out, as temperatures rise higher than for hundreds of millions of years.
As populations and global warming temperature increases, the global food chain becomes more critical:
“Efforts to anticipate how climate change will affect future food availability can benefit from understanding the impacts of changes to date. We found that in the cropping regions and growing seasons of most countries, with the important exception of the United States, temperature trends from 1980 to 2008 exceeded one standard deviation of historic year-to-year variability. Models that link yields of the four largest commodity crops to weather indicate that global maize and wheat production declined by 3.8 and 5.5%, respectively, relative to a counterfactual without climate trends. For soybeans and rice, winners and losers largely balanced out. Climate trends were large enough in some countries to offset a significant portion of the increases in average yields that arose from technology, carbon dioxide fertilization, and other factors.”
Major global warming affects on climate change are largely "irreversible" for more than one thousand years. Current global warming temperature increase above preindustrial is +0.8 °C with 7 billion people.
No temperature increase above preindustrial temperature is “safe” for the human race.
Medical advances, more effective vaccines, antibiotics and improvements in public-health conditions has boosted life expectancy in developing countries, where most of the population growth is taking place, according to the UN data reported July 29, 2011 in the journal Science.
● Science 29 July 2011 examines the opportunities and challenges created by demographic changes around the world. journal Science "Population and Development" Science 29 July 2011: Vol. 333 no. 6042 p. 499
“Projections of population size, growth rates, and age distribution, although extending to distant horizons, shape policies today for the economy, environment, and government programs such as public pensions and health care. The projections can lead to costly policy adjustments, which in turn can cause political and economic turmoil. The United Nations projects global population to grow from about 7 billion today to 9.3 billion in 2050 and 10.1 billion in 2100, while the Old Age Dependency Ratio doubles by 2050 and triples by 2100.”
“All population projections are uncertain, as they are entirely dependent on assumptions about the future—for instance, how many children a woman will have 20 or 30 years hence. In that sense, the numbers in these graphics compiled by Science can be considered best scientific guesses, not destiny. What's more, the further out one looks, the cloudier these projections become. Still, population projections offer a window into what the world might look like in 2050.”
'Explosive' population growth threatens developing nations, says UN
Posted on Jul 29th 2011 by Kate Taylor
TG Daily
By the end of this year, there will be seven billion people on the planet, a whole billion more than in 1999, according to new UN figures.
In 2011, approximately 135 million people will be born and 57 million will die a net increase of 78 million people.
And between now and 2050, an estimated 2.3 billion more people will be added — nearly as many as inhabited the entire planet in 1950. By the end of the century, the population will reach 10.1 billion, says the Population Division of the UN's Department of Economic and Social Affairs.
Practically all the growth in the next 40 years - 97 percent - will take place in less developed regions, with just under half in Africa.
By contrast, the populations of more developed countries will remain flat - although they'll age, with fewer working-age adults to support the rest of us on our pensions.
It's an unprecedented global demographic upheaval, says Professor David Bloom of the Harvard School of Public Health.
"Although the issues immediately confronting developing countries are different from those facing the rich countries, in a globalized world demographic challenges anywhere are demographic challenges everywhere," he says.
Naturally, there's considerable uncertainty about these projections. For some time, there's been a gradual decline in the number of births per woman - but if we all get a touch more enthusiastic about babies, the figures could be higher.
Depending on birthrate, the ranges for 2050 vary from 8.1 to 10.6 billion, and the 2100 projections vary from 6.2 to 15.8 billion.
Already under a lot of pressure for resources, many developing countries will likely face tremendous difficulties in supplying food, water, housing, and energy to their growing populations, with repercussions for health, security, and economic growth.
"The demographic picture is indeed complex, and poses some formidable challenges. Those challenges are not insurmountable, but we cannot deal with them by sticking our heads in the sand," says Bloom.
"We have to tackle some tough issues ranging from the unmet need for contraception among hundreds of millions of women and the huge knowledge-action gaps we see in the area of child survival, to the reform of retirement policy and the development of global immigration policy. It's just plain irresponsible to sit by idly while humankind experiences full force the perils of demographic change."
Fin
There are two major increasing influences on human (anthropomorphic) greenhouse gases (GHG): increased populations and increased gross domestic product (GDP).
Increased human GHGs increase natural GHGs. It is the combined natural and human GHGs that form a carbon dioxide equivalent (CO2eq) that produces global warming temperature increase.
A new peer-reviewed report released week of July 11, 2011, by the Economics and Equity for the Environment (E3) network found that each ton of carbon dioxide (CO2) emitted in the atmosphere results in as much as $893 in economic damages, far greater than the government's current "social cost of carbon" estimate of $21 per ton.
With increased carbon dioxide equivalent (CO2eq), Earth’s temperature increases to a human race terminal point:
+6.4°C: Most of human life terminated (prior to 2099)
The sudden release of large amounts of natural gas from methane clathrate deposits in runaway climate change could be a cause of past, future, and present climate changes. Warming seas lead to the release of methane clathrates trapped in sub-oceanic sediments: methane fireballs tear across the sky, causing further warming. The oceans lose their oxygen and turn stagnant, releasing poisonous hydrogen sulphide gas and destroying the ozone layer. Deserts extend almost to the Arctic. "Hypercanes" (hurricanes of unimaginable ferocity) circumnavigate the globe, causing flash floods, which strip the land of soil. Humanity reduced to a few survivors eking out a living in polar refuges. Most of life on Earth snuffed out, as temperatures rise higher than for hundreds of millions of years.
As populations and global warming temperature increases, the global food chain becomes more critical:
“Efforts to anticipate how climate change will affect future food availability can benefit from understanding the impacts of changes to date. We found that in the cropping regions and growing seasons of most countries, with the important exception of the United States, temperature trends from 1980 to 2008 exceeded one standard deviation of historic year-to-year variability. Models that link yields of the four largest commodity crops to weather indicate that global maize and wheat production declined by 3.8 and 5.5%, respectively, relative to a counterfactual without climate trends. For soybeans and rice, winners and losers largely balanced out. Climate trends were large enough in some countries to offset a significant portion of the increases in average yields that arose from technology, carbon dioxide fertilization, and other factors.”
Major global warming affects on climate change are largely "irreversible" for more than one thousand years. Current global warming temperature increase above preindustrial is +0.8 °C with 7 billion people.
No temperature increase above preindustrial temperature is “safe” for the human race.
