Demographic cycle, Biology

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DEMOGRAPHIC CYCLE -

1.       First stage -

Bhigh   - Dhigh   =  0

2.       Second stage -

Bhigh   - Dlow   =  Gmore

eg. Many countries of South Asia, Africa, Kanya & Bangladesh.

3.       Third stage -

Bhigh   -  Dlow   =  G

eg. India, China, Singapore

4.       Fourth stage -

Blow   - Dlow   =  0

eg. Austria, U.K., Denmark, Swedeen.


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