sq km (836,330 sq mi), of which 1,834,000 sq km (708,000 sq mi) is ice cap. Greenland ■ Before Reading Global Reading Detailed Reading After Reading Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate. A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities. Global Warming ■ 1.Why is the world getting hotter? Before Reading Global Reading Detailed Reading After Reading Greenhouse Effect Directions: Watch the video and answer the questions given below. global warming, greenhouse effect Tips: ■
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