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The urban population has increased from 220 million to 2.8 billion in 20th century.

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It is currently projected that by 2030, 5 billion people will live in urban areas and those people from developing countries will represent 81% of the world population.
 

For instance, since 2009, 80 million pregnancies per year (38% of all pregnancies) were unintended
 

Today, $15 billion per year could provide complete access to modern contraception for all women in the world, but still 201 million women lack access (137 million use no method).
 

The current human population growth has produced a doubling within the lifespan of people under 40; has tripled for many alive today

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Global agriculture currently uses 60% of all runoff water and is projected to exceed total supply in 2040

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Currently, approximately 1 billion people live in extreme poverty in the world

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9 countries account for half of the projected 2010-2050 increase listed in order of their contribution: India, Pakistan, Nigeria, Ethiopia, USA, Congo, Tanzania, China, and Bangladesh.

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​1.53 billion hectares (12% of ice free land) has crops; 3.38 billion hectares has pastures (26%); amount has gone up 3% in the last 20 years, farming is responsible for 30% of greenhouse gas emissions

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1 billion people are already undernourished and in order to be able to feed an estimated 9 billion people in 2050

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1 billion hectares of wild land may have to be converted and large additional water withdrawals will be needed.

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Currently, only 2% of the world’s food supply is ocean derived

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Half people in developing world suffer from water‐borne Diseases

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Energy use globally; 34% oil; 25% coal; 21% nat. gas; 11% biomass; 6.5% nuclear; 1.2% hydro =16 terawatts (million million) (300 years ago –almost all biomass)

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2+ of 7 billion people use only biomass (burning local wood, crop residues, etc.)

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Poorest 4 billion use 2.9TW; =0.7kW/ yr/person (vs. 8.0 kW/yr/person for top 0.8 billion
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Human use of energy in Western nations is 120 watts from food consumed and 11,000 watts from all other uses (99% nonfood)
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The World Health Organization (WHO) estimates that 6 million worldwide are blind due to trachoma and more than 150 million people are in need of treatment.
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Trachoma was once a major problem worldwide, but it now affects some 84 million people in the most socio-economically disadvantaged regions.
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There are approximately 10.6 million people with inturned eyelashes (entropion trichiasis), for which eyelid surgery is needed to prevent blindness. The majority of these people are women.
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An estimated 5.9 million adults are irreversibly visually impaired from corneal scarring due to trachoma.
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women 4 times more likely to be visually impaired from trachoma than men
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Roughly half of the global burden of active trachoma is concentrated in 5 countries (Ethiopia, India, Nigeria, Uganda and Sudan), and that of trichiasis in 4 countries (China, Ethiopia, Nigeria and Uganda).

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Overall, Africa is the most affected continent: 27.8 million cases of active trachoma (68.5% of all cases globally) and 3.8 million cases of trichiasis (46.6% of all) occur in 28/46 countries in the African Region. The highest prevalences of active trachoma have been reported from Ethiopia and Sudan, where the infection often occurs in more than 50% of children younger than 10 years; trichiasis is found in up to 19% of adults.
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1.2 billion people lack access to safe drinking water and 2.4 billion people lack access to proper sanitation facilities.