The World Environmental Day is one of the events around the world. Started by the United Nations in 1972, it is on June 5th every year. Since it was started, it has been widely celebrated. It is not only to improve people's sense of environmental protection, but also to encourage people to do something helpful for the Earth. Now, more than 100 countries celebrate it together. On that day, people do many activities, such as planting trees, holding concerts, and giving speeches. They hope to protect the environment and live in a green world forever. The event also has different themes every year. Do you know what the theme is for the year of 2022? The World Environmental Day is one of the events around the world. Started by the United Nations in 1972, it is on June 5th every year. Since it was started, it has been widely celebrated. It is not only to improve people's sense of environmental protection, but also to encourage people to do something helpful for the Earth. Now, more than 100 countries celebrate it together. On that day, people do many activities, such as planting trees, holding concerts, and giving speeches. They hope to protect the environment and live in a green world forever. The event also has different themes every year. Do you know what the theme is for the year of 2022? The World Environmental Day is one of the events around the world. Started by the United Nations in 1972, it is on June 5th every year. Since it was started, it has been widely celebrated. It is not only to improve people's sense of environmental protection, but also to encourage people to do something helpful for the Earth. Now, more than 100 countries celebrate it together. On that day, people do many activities, such as planting trees, holding concerts, and giving speeches. They hope to protect the environment and live in a green world forever. The event also has different themes every year. Do you know what the theme is for the year of 2022?