Stable population with low birthrate and low deathrate. None of the above are correct. Widespread plowing destoys soil fertility in the tropics. Fertilizers don't work as well in the tropics. American plowing practices requires deforestation which increases topsoil erosion in the tropics.
Pesticides are harmful in the tropics because of the lack of a cold winter season.
World population has been growing more and more rapidly over the last century. Exporting US agricultural production methods to the rest of the world would probably increase total world food production, but would also increase world energy consumption. The seriousness of many environment and resource problems is a direct result of the large number of people. Population growth in the world is very uneven, with the fastest rates of growth in countries that can least afford higher populations. Headward erosion .