An environmental problem is any issue that affects the environment, such as air and water pollution, deforestation, overpopulation, and climate change. Two of the most common environmental problems are SMOG and acid rain. SMOG is a type of air pollution caused by the burning of fossil fuels, which releases pollutants into the atmosphere. Acid rain is a form of precipitation that is highly acidic due to the presence of pollutants in the air. Both SMOG and acid rain can have serious consequences for the environment, including damage to ecosystems, health problems, and economic losses.