The pollution of the environment has become an important problem that the world has to face. Luckily, humans have realized it and we have been taking steps to deal with this problem. And many days have been appointed(指定). On March 12 every year, many Chinese people plant trees because it is China’s Tree Planting Day. It first began in 1979. Different countries made different days as Tree Planting Day. Some countries’ Tree Planting Day is the same day as World Forest Day, such as France. World Forest Day comes on March 21 every year. It was started by Spain in 1971. And the first World Forest Day was held on March 21, 1972. The purpose of World Forest Day is to encourage everyone to protect(保护) the trees because they are very important to our life. Earth Day comes on April 22 every year. The purpose of Earth Day is to encourage people all around the world to protect the environment. It was created in America in 1970. But it wasn’t until 2009, April 22 that was named Earth Day by the UN. Smoking is bad for our health. In order to stop people from smoking, April 7 was made as World No-Tobacco Day(世界无烟日) in 1987. The first World No-Tobacco Day began in 1988. But in 1989, it was made another day, on May 31 every year.
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