Every year the world goes dark for one hour, the Earth Hour. The event is organised by the ___NATION___ World Wildlife Fund. At tourist destinations, in offices and private homes, lights are switched off for one hour at ___EXACT___ 8:00 pm. The idea is to show that our planet is in danger and it needs care and ___PROTECT___. It’s ___POSSIBLE___ to remain indifferent to changes in the climate which go on and on. The Earth Hour is not about saving an hour’s electricity. It’s about realising that we live on a ___WONDER___ planet and need to look after it – not just for an hour a year but every day. The Earth Hour is a part of an ___ECOLOGY___ education whose aim is to make people understand their responsibility to the planet.