Well overpopulation puts huge dent in available food supplies. This results in deforestation to make both farmland and lumber for building to house everyone. deforestation create CO2, and depletes vegetation which would have absorbed CO2
I believe it would be agriculture which brought them more money thus leading to a stronger economy.
A. countryside
Many reasons:
1) wrong tense for any of the other answers
2) none of the other answers provide refuge
Rice prices must be kept within reach of the poorest people.