Unit 1 Cultural relics Section Ⅰ Warming amp；Reading Pre-readingEvery year, the World Heritage Committee chooses natural and cultural places around the world that have global (全球的) importance. They name these places World Heritage Sites. When a place becomes a World Heritage Site, it can receive money from the United Nations Educational, Scientific and Cultural Organization (UNESCO) to help protect it.But even when a place is an official World Heritage Site, it can still be at risk. Every year, the World Heritage Committee looks at World Heritage Sites that could be in danger. From these, they decide which places they will put on their official List of World Heritage in Danger.There are many reasons a World Heritage Site becomes endangered. For example, places can become endangered through natural ecological ( 生 态 的 ) damage. Over time, wind and water can break down natural areas.Another risk to natural areas around the world is climatechange (气候变化). For example, rising temperatures affect the Sagarmatha National Park. In the park stands Mount Everest, the world's tallest mountain. Beautiful ice glaciers on the topof the mountain are now melting. It also affects the local plants and animals.Much of the risk to World Heritage Sites comes from human acts. Abu Mena is an ancient Christian city in Egypt. It is a historical site made of many old stone buildings. Abu Mena was listed as a World Heritage Site in 1979. Recent farming projects in the area caused underground water levels to rise. This makes the ground unstable (不稳定的). Some of the buildings of Abu Mena fell. The Egyptian government put sand at the base of some of the buildings. But the site is still in danger.Section_...
