Well-known landmarks all over the world switched off their lighting for an hour on Saturday evening as a part of an environmental consciousness marketing campaign, Earth Hour. The Eiffel Tower in Paris, Rome’s Colosseum and the Parthenon in Athens had been all used within the switch-off. New Delhi’s Akshardham temple, the Sydney Opera Space and the Sagrada Familia in Barcelona additionally joined in.Earth Hour is organised via the Global Extensive Fund for Nature and it encourages other people to show off their lighting for 60 mins to lift consciousness of environmental problems.