Answer:
Environmental issues such as air pollution, fires, and littering have various causes. Air pollution can be caused by industrial emissions, vehicle exhaust, and the burning of fossil fuels. Fires can occur due to natural causes like lightning strikes or human activities such as careless disposal of cigarettes or intentional arson. Littering is often a result of irresponsible behavior and a lack of awareness about the impact of waste on the environment. It is important for individuals and communities to be educated about these causes and take steps to reduce their contribution to these environmental issues.