On Sunday, April 22, people all over the world take time out to appreciate(珍惜) the earth that we all share. It’s Earth Day, a special day to learn about our planet（星球） and how to take care of it.
On Earth Day, some people listen to speeches about the environment. Others help clean up their offices or save water and electricity at home. Your parents may even decide to take a day off from driving their cars.
The idea for Earth Day came from a U.S. Senator (参议员), who was worried about the pollution and the health of plants and animals. And the idea quickly caught on. In 1970, the first Earth Day was celebrated. More than 20 million people in cities all over the U.S. took part in. Since then, Earth Day has been used to educate people about their role in taking care of our planet.
Now, Earth Day has become a global celebration. In 1990, 200 million people from 140 countries took part in clean-ups, tree planting and other environmental events on Earth Day.
在地球日中，一些人去听关于环境的讲座。其他的人就帮忙清洁他们的办公室或者在家节约用电用水。你的父母可能甚至决定暂停开车一天。
地球日的想法是来自英国的一个担心地球污染和植物、动物的健康的参议员的。这个想法很快就在1970年被实行，第一个地球日也在这天被第一次超过20百万英国市民庆祝。从那以后，地球日就用来提醒人们他们保护地球的义务。
现在，地球日已成为一个全球的庆祝活动。在1990年的地球日时，来自140个国家的200百万人民参与到大扫除，植树和其他环境活动中。
