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课件网) Unit 6 Earth first-Developing ideas: What’s really green Think of green, and you think of… “Green”: if you say someone or something is green, you mean they harm the environment as little as possible. Lead-in: Look at the questions about “green living” and tick your answers in Activity 1. Fast Reading: What are the “green truths” mentioned in the passage “Green truths” 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. Tip: Subheadings(副标题) (Para 1)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 (only half true or completely false) “green truths” real truths reasons solutions Detailed Reading: According to the writer, what are the real truths and reasons How can we become greener Detailed Reading: Real truths Reasons Solutions Paper shopping bags are better than plastic ones. Plastic bags cause litter and are a danger to wild animals, which mistake them for food. 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. (Para 2) Real truth “green truth” Solution Reasons 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. This happens 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. (Para 3) Real truth Reasons Solution 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, it is not that simple. It is the production of food, not its transport, that uses most of the energy and produces most of the greenhouse gases. 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. (Para 4) Real truth “green truth” Reasons Solution It’s better to take a shower than a bath. 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. Therefore, the key is to kee ... ...
