Population growth and change - CCEA - Revision 2 - GCSE Geography - BBC Bitesize. As a country passes through the demographic transition model, the total population rises.
Most LEDCs are at stage 2 or 3 (with a growing population and a high natural increase). Most MEDCs are now at stage 4 of the model and some such as Germany have entered stage 5. Will we run out of natural resources? - OCR - Revision 3 - GCSE Geography - BBC Bitesize. Malthusian theory examines the relationship between population and food production, suggesting that while population grows geometrically (ie 1, 2, 4, 8, 16 etc), food production increases arithmetically (ie 1, 2, 3, 4, 5 etc).
Eventually, this leads to population outstripping food production, leaving much of the world hungry. Boserupian theory came much later in 1965, and suggested a different argument. The global food industry - Revision 2 - GCSE Geography - BBC Bitesize.
Spain's population. Sources activity. M.gapminder.