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The human population of the planet is estimated to now have passed 6 billion people due to improved health care and reduced infant mortality while expanding life spans.
The United Nations Population Fund estimate the population will rise to around 9.3 billion by 2050.
By 2050, world population is expected to be between 7.9 billion (low variant) and 10.9 billion (high variant), with the medium variant producing 9.3 billion.
Over 8 million children under the age of 5 die from malnutrition and mostly preventable diseases, each year.
164,000 people, mostly children under 5, died from measles in 2008.
In 2002, almost 11 million people died of infectious diseases alone
One billion people lack access to health care systems
AIDS/HIV has spread rapidly. UNAIDS estimates for 2008 that there are roughly:
33.4 million living with HIV
2.7 million new infections of HIV
2 million deaths from AIDS
1.6 million People still die from pneumococcal diseases every year
Causes some 243 million acute illnesses and 863,000 deaths, annually.
Geopolitics such as supporting dictatorships, rising terrorism, “stability” of nations that supply energy
Economic efficiency versus population growth debate
Reliance on foreign sources of energy
Oil and other fossil fuel depletion such as peak oil...etc
Renewable and other alternative energy source
Environmental issues, in particular climate change
Energy needs of poorer countries, and demands from advancing developing countries such as China and India.
- Decreasing death rates in poorer countries, due to medical enhancements, better nutrition, and improved sanitation led to population increases.
- High mortality balanced by a high birth rate led to stable populations before the rapid growth in the eighteenth century.
- Religious beliefs that promote large families and lack of education for women in poorer countries hamper the ability to control populations.
- Only Western forms of birth control techniques and educational programs will slow birth rates.
Increasing concentration of ownership of land
Lack of rights for women
Removing or reducing land rights
Economic/Trade policies
Lack or reduction in health care
Lack or reduction of education
Bright white ice reflects sunlight
When it is replaced by darker water, the ocean and the air heat much faster, a feedback that accelerates ice melt and heating of surface air inland, with resultant loss of tundra.
Less sea ice leads to changes in seawater temperature and salinity, leading to changes in primary productivity and species composition of plankton and fish, as well as large-scale changes in ocean circulation, affecting biodiversity well beyond the Arctic.
World population reached 6.1 billion in mid-2000 and is currently growing at an annual rate of 1.2 per cent, or 77 million people per year. Six countries account for half of this annual growth:
India for 21%
China for 12%
Pakistan for 5%
Nigeria for 4%
Bangladesh for 4%
Indonesia for 3%
The ice in the Arctic does thaw and refreeze each year, but it is that pattern which has changed a lot in recent years as shown by this graph: