The Challenge of ANTARCTICA: A hundred years ago, the great explorers Scott, Shackleton and Amundsen were racing to be the first to reach the South Pole.

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The Challenge of ANTARCTICA: A hundred years ago, the great explorers Scott, Shackleton and Amundsen were racing to be the first to reach the South Pole.

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Here are the correct words to complete the sentences: 1) **causing** (Full sentence: ...burning fossil fuels, greenhouse gases and deforestation are **causing** world temperatures to rise.) 2) **over** (Full sentence: But **over** the past 50 years, Antarctica's temperatures have increased by about 3°C...) 3) **eventually** (Full sentence: If Antarctica's thick, polar ice sheet **eventually** melts, not only will the world heat up generally, but global sea levels could rise by about 6 metres...) 4) **on** (Full sentence: This is extremely worrying, as almost every city with over 10 million people is **on** the coast!) 5) **leads** (Full sentence: Another problem is that melting ice forms clouds, which **leads** to more snowfall.)

The Challenge of ANTARCTICA: A hundred years ago, the great explorers Scott, Shackleton and Amundsen were racing to be the first to reach the South Pole.

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