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We are living in the modern world and we have to face serious problems about the environment. One of the prominent problems is air pollution. Air pollution is caused by two specific reasons, which can be tackled by using appropriate measures. The first reason to be mentioned is human activities. People always litter everywhere and burn the rubbish without thinking of its consequences. Exhaust fumes from factories and vehicles are too much, so the level of air pollution is higher. Another reason is natural disasters. Drought often happens, which caused forest fires. This makes the air become more contaminated. There are several measures can be taken to deal with air pollution. The government should raise people's awareness. When people know the negative effects that air pollution creates, they will protect the environment more. We should plant more trees to protect our forests. To sum up, human activities and natural disasters are the main causes of air pollution. We have to take measures to protect the environment properly.

The current environment is heavily polluted by the waste of industrial parks, domestic waste, dust from vehicles ... With the rate of population growth and industrial and industrial development speed. In the current urbanization process, the cultivated land area is getting narrowed and land quality is deteriorating. For polluted water sources, it reduces the biodiversity in the water. Water pollution is caused by water and industrial wastes discharged into river basins without proper treatment; chemical fertilizers and pesticides seep into groundwater and pond water; Domestic wastewater discharged from riverine residential areas causes serious pollution, affecting the health of people and creatures in the area. Air pollution is caused by factories 'exhaust gas, vehicles' exhaust gas, which makes the air unclean or causes unpleasant odors and reduces vision when seen from dust. Thus, polluted environment is a threat to human life. We need to sound the alarm bell to wake up people, we need to join hands to protect the environment.