➤ The Earth is heating up. The average ____ temperature is 0.75℃ higher now than it was 100 years ago. ➤ When we burn ____ fuels, they give off ____ gases like carbon dioxide (CO2). This causes ____ warming. ➤ We have cut down over 50% of the Earth's ____forests in the last 60 years. These are important because they remove CO2 from the atmosphere and add oxygen. They are also home to over half of the world's plant and animal species. ➤ Some scientists believe that by 2050, about 35% of all plant and animal species could die out because of ____ change. ➤ ____ levels are rising and the polar ____ caps are melting. ➤ Scientists say that fossil fuels like coal and gas may run out by the year 3000. So we need to develop alternatives, such as ____ energy and nuclear energy.

Solutions Pre 4E Global Warming Fact File

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