B. DURING READING Read the following text. Global Warming is the increase in the average temperature of the atmosphere, oceans, and landmasses of Earth The planet has warmed (and cooled) many times during the 4.65 billion years of it history. At present Earth appears to be facing a rapid warming, which most scientists believe results at least in part from human activities. The chief cause of this warming is thought to be the burning of fossil fuels, such as coal, oil, and natural gas, which releases into the atmosphere carbon dioxide and other substances known as greenhouse gases. As the atmosphere becomes richer in these gases, it becomes a better insulator, retaining more of the heat provided to the planet by the Sun. An Introduction To English Reading Skills The Language Centre -UIN SGD Bandung The average surface temperature of Earth is about 15^circ C(59^circ F) Over the last century, this average has risen by about 0.6 Celsius degree (1 Fahrenheit degree). Scientist predict further warming of 1.4 to 5.8 Celsius degrees (2.5 to 10.4 Fahrenheit degrees) by the year 2100. This temperature rise is expected to melt polar ice caps and glaciers as well as warm the oceans, all of which will expand ocean volume and raise sea level by an estimated 9 to 100 cm (4 to 40 in)flooding some coastal regions and even entire islands.Some regions in warmer climates will receive more rainfall than before, but soils will dry out faster between storms. This soil waterlessness may damage food crops, disturbing food supplies in some parts of the world. IMicrosoft@Encarto@Reference Library 20051 Glossary Fossil fuels :batubara, minyak, gas alam Rapid : cepat Has risen : meningkat Chief :utama Melt : meleleh Substance : material Polarice : Antartika Insulator : isolator Coastalregion : pantai Part 1: Comprehension Questions Answer the following questions based on the information in the text. 1. What is global warming? __ 2. What are the main causes of global warming? __ 3. What are greenhouse gases? __ 4. According toscientist, what will happen in 2100? Ibannonas the offect of alobalwasmina in 21007