At our current growth rate the world's population of 5.8 billion would double in only about 45 years. The United States population would double in less than 100 years. The closer these two rates are, the slower population growth will be. Because of all of these reasons, efforts by the government should be made to slow down the world population growth. Overpopulation is becoming a bigger concern as the growth rate continues to skyrocket.
Overpopulation is sometimes mis understood or mistaken with other issues.
What is relevant is carrying capacity. Carrying capacity refers to how much an area can hold having all things at equilibrium, including all plants and animals. An area is overpopulated when its long-term carrying capacity is being degraded by its current human occupants. Some people say the earth is not overpopulated since the United States can produce more food and products than are used. Now if you look at it world-wide the products we have are often from other countries.