Lesson 4/43 min
Theory, megacities and juvenile centres
Malthus's theory
- Population grows geometrically: 1, 2, 4, 8, 16
- Food production grows arithmetically: 1, 2, 3, 4, 5, 6
Megacity and metacity
- Megacity: a metropolitan area with 10 million or more people
- Metacity: a metropolitan area with 20 million or more people
- Dhaka is called a megacity in exams because of its very large population
Did you know?: ZPG stands for Zero Population Growth.
Juvenile development centres
| Centre | Location |
|---|---|
| National Juvenile Development Centre (est. 1978) | Tongi, Gazipur |
| Second Juvenile Development Centre | Pulerhat, Jashore |
| National Girls' Development Centre | Konabari, Gazipur |
Watch out: Khandokar says there are 3 centres (2 for boys, 1 for girls) and gives the juvenile-offender age as 7–16. The Children Act 2013 defines a child as under 18.
Check yourself
According to Malthus, how do food and population grow?
At a glance
- 1
Malthus: population grows geometrically (1, 2, 4, 8), food arithmetically (1, 2, 3, 4).
- 2
A megacity has over 10 million people, a metacity over 20 million.
- 3
The National Juvenile Development Centre is at Tongi, Gazipur; founded 1978.
- 4
The second juvenile centre is at Pulerhat, Jashore; the girls' centre at Konabari, Gazipur.