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Read the text and fill in the gaps! There are two extra options you do not need to choose.48 sites on the World Heritage List are currently considered ______ (1) serious risk. For sites of natural beauty, climate change, natural disasters, environmental accidents, erosion and pollution all contribute to this risk. Recently, mining and oil exploration, as well as dam-building, _______ (2) irreversible damage, especially in Africa. For sites of cultural significance, mass tourism can be a problem, especially at the more famous destinations. For example, visitors to the Alhambra in Granada, Spain, are now limited and large groups can no longer visit because of damage to the site. In some parts of the world, looting and ______ (3) can also be a big issue at sites which don’t employ sufficient security guards or other forms of protection. Wars and conflicts can be an important factor in the lack of protection offered at such sites.Although such threats are worrying, there have been _______ (4) too. The ancient site of Delphi in Greece was recently added to the list after plans to build an aluminium plant nearby were abandoned. The magnificent temples of Angkor Wat in Cambodia have now been ________ (5) and the Whale Sanctuary in El Vizcaíno Bay in Mexico has also recently been saved after threats such as oil drilling, development and tourism were averted.
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