Which statement below about the major impacts of overpopulation is NOT true?

Population growth will increase air and water pollution, while also contributing to the loss of ecosystems.

Increase in population will hasten the depletion of non-renewable natural resources and the loss of species.

Overpopulation will lead to further deforestation, and the loss of trees will lead to less oxygen in the atmosphere.

Unchecked population growth will cause migration to cities and the destruction of infrastructures such as dams and bridges.

To determine which statement is NOT true about the major impacts of overpopulation, we need to evaluate each statement individually.

Statement 1: Population growth will increase air and water pollution, while also contributing to the loss of ecosystems.
This statement is true. As the population increases, there will be larger amounts of waste, leading to increased pollution. Additionally, the expansion of human settlements and agricultural activities contributes to the destruction of ecosystems.

Statement 2: Increase in population will hasten the depletion of non-renewable natural resources and the loss of species.
This statement is also true. With a larger population, there will be an increased demand for natural resources, leading to their depletion. In addition, as human activities expand, there is a higher risk of habitat destruction, which can result in the loss of various species.

Statement 3: Overpopulation will lead to further deforestation, and the loss of trees will lead to less oxygen in the atmosphere.
This statement is also true. As the population grows, there will be a greater need for land and resources. This often leads to deforestation, which further reduces the number of trees. Trees are responsible for producing oxygen through the process of photosynthesis, so their loss can impact the levels of oxygen in the atmosphere.

Statement 4: Unchecked population growth will cause migration to cities and the destruction of infrastructures such as dams and bridges.
This statement is NOT true. While population growth can result in migration to cities, it is not the direct cause of the destruction of infrastructure such as dams and bridges. Infrastructure depends on proper maintenance, planning, and management to ensure its safety and functionality, regardless of population size.

Therefore, the statement that is NOT true about the major impacts of overpopulation is: Unchecked population growth will cause migration to cities and the destruction of infrastructures such as dams and bridges.