USA HISTORY

Detailed explanation-1: -A growing population means increased demand for food, which in turn means more land must be used for growing crops and grazing livestock.

Detailed explanation-2: -With 83 million more people appearing on the planet every year, rising populations are placing increasing pressure on the land. Each of those people will need somewhere to live, a place to work, fertile land to provide them with food. They will need water and energy to stay warm or to light their way at night.

Detailed explanation-3: -97% last decade. Population change at the national level stems from natural increase (the difference between births and deaths) and international migration (the movement of people into and out of the United States).

Detailed explanation-4: -The decline in U.S. population growth is likely due to a confluence of factors: lower levels of immigration, population aging, and declining fertility rates. A drop in net immigration to the United States is a key factor in the country’s declining population growth rate.

Detailed explanation-5: -It reduces the quality and quantity of natural resources through overexploitation, intensive farming and land fragmentation. Regions with high population pressure face scarcity of arable land, which leads to shortened/removed fallow period, declining soil fertility and farm income due to farm subdivision.