Unit 6 Earth first Starting out 导学案-2023-2024学年高中英语外研版（2019）必修第二册

B2U6 Earth first I. Watch the video and fill in the blanks with numbers. 1. ________ square kilometres of forest disappear every year. 2. Around ________ trees are cut down each day just to make toilet paper. 3. Each day, around _________species of plants and animals become extinct-nearly________times the natural rate of extinction. 4. Over_________animals are killed by ocean pollution each year. 5. ________people don't have clean drinking water. 6. A plastic bottle can take_______ years to break down. 7. The ice caps are more than 50% thinner than they were _______ years ago. II. Get to know: A carbon footprint footprint is the amount of greenhouse gases - primarily carbon dioxide - released into the air by a particular human activity. For example, when you drive a car, the engine burns fuel which creates a certain amount of greenhouse gases. When you heat your house with coal or electricity, you also generate greenhouse gases. Even the production of food and goods emits some quantities of greenhouse gases. Together these emissions make up a carbon footprint. III. Six things you can do 1. Reduce waste by choosing reusable products - get a(an) ______________ for example. 2. Try to reduce your . Walk or ride a bike instead of taking a car. 3. Use such as solar energy and wind power. 4. The less energy you use,the less carbon dioxide isreleased. Replacing a regularlight bulb with a(n) ____________ is great start. 5. important because clean water is a limited resource. Also, we use a lot of energy to process clean water. 6. Planting trees can help a lot in reducing the greenhouse effect because trees absorb the carbon dioxide in the air. IV. What should we do? It’s high time we (did)... It’s urgent to do... It’s requested that sb. should do... As an individual It’s high time we led a green life. For example, we can choose carpooling, riding a bike or taking public transportation. It’s urgent