The sound of children singing is coming from the square in front of the gate. If you listen carefully, it's the garbage truck's song: "Take out the garbage quickly, take out the garbage in three different categories; take out the garbage quickly, take out the garbage quickly, take out the garbage in three different categories, take out the garbage in three different categories, take out the garbage in three different categories, take out the garbage in three different categories, what are the categories? What are the three categories? Resource waste, general waste and food waste .....". Curious to find out more, it turned out that the children of the Best family had made three garbage trucks and were playing with them in groups, matching the song. Teaching Theme of the Middle Class Exploring Environmental Protection

In recent years, people have become more and more concerned about environmental pollution, and air pollution is one of them. According to the World Health Organization, in 2012, a total of 7 million people around the world died due to air pollution. Although people know that air pollution can cause lung and respiratory diseases, they do not know that it is closely related to heart disease and cancer. Prof. Jen Chang-kuen of the Institute of Occupational Medicine and Industrial Hygiene at the University of Taiwan has been studying the effects of air pollution on the human body for many years.