Answer:
One effect of population growth on the physical environment is increased pollution and degradation of natural resources. As the population grows, there is a higher demand for resources such as water, land, and energy, leading to increased exploitation of these resources. This can result in deforestation, depletion of groundwater, and other negative impacts on the environment. Additionally, increased human activity, such as industrialization and transportation, can lead to increased emissions of pollutants and greenhouse gases, contributing to climate change and air pollution. Overall, population growth can put significant pressure on the physical environment, leading to a range of environmental problems.