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Date Population Doubling time5000 BC

50 million -

800 BC 100 million 4,200 years

200 BC 200 million

600 years

1200 AD 400 million

1,400 years

1700 AD 800 million

500 years

1900 AD 1600 million

200 years

1965 AD 3200 million

65 years

2000 AD 6100 million

51 years to double

2050 AD 8900 million

215 years to double

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Age wise populationWorking population- age group 14 to 60 yearsDependable population- age group between 0

to 14 years and age group above 60 years Sex wise compositionNumber of females per 1000 male population Kerala-1058 females per 1000 malesHaryana-861 females per 1000 males

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Economic Social

Health

Physical Natural

Political

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Per capita income Distribution of National Income

Economic security

 Job availability

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Family Community

Social security

Cultural development

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Physical Mental

Food quality (balanced diet)

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Housing condition Transport condition

Communication facilities

Public services Aesthetics

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Quality of Air Quality of drinking water

Solid waste management

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Stable Government Human Rights

Political pressure

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The prediction of future populations basedon the

present age-sex structure, and with thepresent

rates of fertility, mortality, and migrationr = b - d+_ m

where r = total growth of population

b = total births in that yeard = total deaths in that year+_ m = Positive or negative effects of 

migration

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Pn = P0 + (n x i)Where, Pn = Population after nth decade

P0 = Present Population

n = Number of decadesi = Growth rate of population per

decade 

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Pn= Po[1+i/100]n

Where Pn= Population after nth decade

P0 =Present population

n = Number of decades

i = Growth rate per decade

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Pn=P0+ni+(n(n+1)/2 x r)

Where Pn = Population after nth decadeP0 = Present population

n = Number of decadesr = Average increase for two

consecutive decadesi=Growth rate per decade

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Defn: The method in which informs about the needs to protect the environment and the measures taken to protect it and also about the ill effects of over exploitation and abuse 

of the environment is called as Environmental Education 

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Learning basic facts about humanity Improve value system that she/he holds and

put to use.

Global stage

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Caused by human HIV Leaves humans susceptible to tumours,

infections

Transmitted through blood transfusion,contaminated needles, childbirth

Global problem,33.2 million people in 2007

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It is studied for academic purpose only Imp. Programs by ministry are:1. Environmental education and training2. Formal environmental education3. Non-formal environmental education4. National green corps Environmental awareness UN decade for sustainable development(2005

to 2014)

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Each person in India has the fundamentalright given by the constitution of India to getsocial security.

Every person of any religion, creed, caste,gender gets these fundamental rights. Theseare also known as Human Rights

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Fundamental rights include:1. Rights of life liberty and security of a person2. Right to own property

3. Right to freedom of opinion and expression4. Right to have an adequate standard of living5. Right to education, freedom of thought,

conscience and religion

6. Right to freedom from torture and degradingtreatment

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Remote sensing techniques Information about minerals, forest fires,

endangered species, quality of water, etc.

Weather forecasting

Biotechnology, Bioengineering, Genomesequencing, DNA database, etc.

Study of environmental changes