Unit 6 Earth First Developing Ideas P68-71 课件-2024-2025学年高中英语外研版（2019）必修第二册

1. Which shopping bag is more environmentally friendly? A plastic bag. A paper bag. Neither of these. Look at the questions about "green living" and tick your answers. Pre-reading 2. What should you do to save energy when leaving your home? Turn off a device. Unplug a device. Neither of these. Look at the questions about "green living" and tick your answers. Pre-reading 3. What food is better for the environment? Food produced near to where you live. Food produced far from where you live. It depends. Look at the questions about "green living" and tick your answers. Pre-reading 4. Which uses less water? Taking a bath. Taking a shower. It depends. Look at the questions about "green living" and tick your answers. Pre-reading Read the four subheadings in the passage and decide if they are true or false. Learning to learn As subheadings expand on the main heading or title, they can be slightly longer than the main heading. Although not every paragraph needs a subheading, they can be skimmed to give the reader an overall understanding of the content of a text. While-reading ? Paper shopping bags are better than plastic ones. ? When you turn off a device, it stops using power. ? Eating local food is good for the environment. ? It’s better to take a shower than a bath. Read the four subheadings in the passage and decide if they are true or false. While-reading Now read the passage to know more. While-reading ? Paper shopping bags are better than plastic ones. ? When you turn off a device, it stops using power. ? Eating local food is good for the environment. ? It’s better to take a shower than a bath. Check your answer. Read and check ? Paper shopping bags are better than plastic ones. Let’s figure out how these statements go wrong. Making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water. The process also produces more greenhouse gases. In fact, both kinds of bags are bad for the environment. So, take a reusable bag with you when you go shopping. Green advice Read and check ? When you turn off a device, it stops using power. Let’s figure out how these statements go wrong. When we turn off a device, such as television, it goes into stand-by mode. Devices in this mode still use power, and older devices in stand-by mode can use even more. To make sure your appliance is in fact off, remove the plug from its power supply. Green advice Read and check ? Eating local food is good for the environment. Let’s figure out how these statements go wrong. In some cases, local produce might have used more energy and produced more greenhouse gases than produce grown a long way away — even taking into account its transport. Apart from the transport, we should take the production of food into account. Green advice Read and check ? It’s better to take a shower than a bath. Let’s figure out how these statements go wrong. It depends on how long you spend in the shower and how large your bath is. If you spend more than eight minutes in a shower, you’ll use as much water as in a bath — about 50 litres of water. The key is to keep your shower time as short as possible. Green advice Read and check Read for structure Most of us are aware that we must take care of the environment, and the majority of us take steps to save energy and reduce waste and pollution. But recently, some “green truths” have been shown to be only half true, or even completely false. Here are some common ones. Which are really green?Paper shopping bags are better than plastic ones.Plastic bags cause litter and are a danger to wild animals, which mistake them forfood. It takes hundreds of years for plastic to break down, but much less time for paper. Because of this, people think paper bags are the better environmental choice.However, making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water. The process also produces more greenhouse gases.In fact, both kinds of bags are bad for the environment. So, take a reusable bag with you when you go shopping.When you turn off a device, it stops using power.When we turn off a device, such as television, it goes into stand-by mode. Devices in this mode still use power, and older devices in stand-by mode can use even more. Thishappens because electricity continues to leak from the device, even when it is turned “off”. To make sure your appliance is in fact off, remove the plug from its power supply.Eating local food is good for the environment.It seems like common sense: eating local food should be better for the environment, because it does not need to be transported long distances and kept cold during transport. Unfortunately,