Kierman was born in Sydney, Australia, and grew up near the sea. For more than 40 years, he raced in international sailing competitions.

    In 1987, Kierman was competing in an around-the world race when he began to 1 the huge amount of rubbish in the world's oceans.  When he returned to Australia, he 2 to do something about it.

    He organized a community 3 called "Clean Up Sydney Harbour". On Sunday, January 8, 1989, more than 40,000 volunteers came out to 4away rubbish. The next year, Kierman made the clean-up a national event. It was a huge 5 Across Australia, about 300,000 people spent the day improving their local 6.

    Since then, "Clean Up Australia" has got 7every year. In 2002, for example, 800,000 people cleaned up almost 15,000 tons of rubbish from Australia's beaches, parks and streets.

    Kierman was 8 with the success of his project. In 2003, he started an even bigger program. With the9 of the United Nations Environment Program, he introduced "Clean Up the World", an international program that supports communities around the world in cleaning up and protecting the environment. "Clean Up the World" has grown 10 and his wonderful idea has now spread from one city to the whole world.

    Earth Hour started in Sydney on March 31st, 2007. It calls on families and buildings to turn off the lights from 20: 30 to 21:30 on the last Saturday night of March.  A year later, on March 29, Earth Hour 2008 became a global activity and was supported by 50 million people from thirty-five countries. On March 28, 2010 over 100 cities in another eight countries took part in it.  In 2012 in China, there were many cities taking part in this activity, especially some large cities, such as Beijing, Shanghai… Many citizens consciously( 有意识的) turned off lights in the hour.  In colleges some students held some activities to make all the students leave their dormitories.

    It was 20:30, Beijing time.  In Shanghai some people were taking a walk with their families or friends. And in Ningbo some young people were holding a party in a park, singing and dancing.

    Earth Hour has a variety of activities, but the final goal is the same, that is focusing on(聚集) climate change and protecting the environment for individuals.

A. The people from the three cities felt very relaxed.

B. In 2007 more than 2.2 million homes and businesses turned off their lights.

C. And without lights, they could also enjoy themselves.

D. Some people in Beijing were having a nice talk with their friends.

E. Earth Hour came to China on that day, too.