阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。
注意：每个空格只填一个单词。
Earth Hour is a global WWF ( formerly known as World Wildlife Fund ) climate change initiative(倡议). This event calls for everyone to stand up and take responsibility towards a sustainable future. Earth Hour is not to be confused with Earth Day.
Millions of people turned off their lights for Earth Hour at 8:30 pm (20: 30) in their local times on the last Saturday of March. Iconic buildings and landmarks from Europe to Asia to the Americas have stood in darkness during previous Earth Hours. Some people enjoy Earth Hour with a candle-lit dinner or a candle-lit bath, while others host large events or parties, either in darkness or with candles, to celebrate Earth Hour. Businesses and government organizations, as well as community and political leaders also take part in Earth Hour. It’s about giving people a voice on the planet’s future and working together to create a sustainable low carbon future for planet earth.
Earth Hour started in Sydney, Australia, in 2007. This event saw 2.2 million homes and businesses turn their lights off for one hour to make their stand against climate change that year. Earth Hour had become a global sustainability movement with more than 50 million people across 35 countries participating in 2008. Global landmarks such as the Sydney Harbour Bridge, the CN Tower in Toronto, the Golden Gate Bridge in San Francisco, and Rome’s Colosseum, all stood in darkness for Earth Hour. In March 2009, hundreds of millions of people took part in the third Earth Hour.
WWF, which organizes the annual Earth Hour event, aims to stop the damage of the earth’s natural environment. It also focuses on building a future where people live in harmony with nature. The organization functions through a network of more than 90 offices in more than 40 countries worldwide. Its first office was found in Morges, Switzerland, on September 11, 1961.
Lights     for Earth Hour

Main points	Supporting details
____	Earth Hour is a global WWF climate change initiative, which__to increase public awareness of climate change.
What do people do ?	Millions of people turned off their lights at 8:30pm(20:30) in their local times on the last Saturday of March. Some people enjoy Earth Hour with their candles___ during dinner or bath. Others choose to_ __ large events or parties, either in darkness or with candles, to celebrate Earth Hour. Some organizations, as well as community and political leaders are also___  in Earth Hour.
Background	Earth Hour, _ _ in Sydney, Australia, in 2007, saw 2.2 million homes and businesses turn their lights off for one hour that year. _ __ 50 million people across 35 countries participate in 2008. In March 2009, hundreds of millions of people took part in the 3^rd Earth Hour. WWF organizes the annual Earth Hour event to stop the damage of the earth’s natural environment and ____ a future where people live in _ __with nature