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1) Lifestraw
20520 김지안, 20526 윤지유

2) Hippo Rollers
20506 서이환, 20507 송지훈

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1. Meaning of Appropriate Technology (20506 서이환)

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1. Meaning of Appropriate Technology (20506 서이환)

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- Appropriate technologies are small-scaled, cost and energy efficient inventions that solve problems around the world.

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1. [1] When and by Whom It Was Invented.(20526 윤지유)

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1. [1] When and by Whom It Was Invented.(20526 윤지유)

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It was made in 2005 by the Vestergaard Frandsen Group of Denmark.

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1. [1.5] It's Real Life Examples : Life Straw(20526 윤지유)

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1. [1.5] It's Real Life Examples : Life Straw(20526 윤지유)

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The LifeStraw explained: How it filters water and eradicates disease

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Lifestraw began to be developed to filter out guinea worm larva and prevent Guinea worm disease. It has developed to the point where dirty water can be converted into safe drinking water. It removes almost all waterborne bacteria, microplastics, and parasites.
While originally developed for people living in developing nations and for distribution in humanitarian crises, LifeStraw water filters have gained popularity as consumer products.
LifeStraw is now used as a tool for survivalists in addition to being used to help combat clean water scarcity worldwide.
Contrary to popular belief, the original LifeStraw is not able to filter out salts or minerals.

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The first step to using life straw is to go to polluted water. And, put the life straw in it. Next, drink purified water.

How can polluted water become clean water? As the life straw name is life straw, this small straw can purify dirty water to clean water that we can drink.
The secret is in its inner side. It seems unsophisticated, but its' inner has a complex organization. Let's look at the picture. The first part is a membrane filter of fibrous tissue commonly used in water purifiers to filter out a certain size or less. The second part is iodine, which filters out germs and bacteria. The third part is to manage freshness and taste with activated carbon.

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My opinion : The reason I think It is important & My criticism of the Technology (20526 윤지유)

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My opinion : The reason I think It is important & My criticism of the Technology (20526 윤지유)

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I heard of this appropriate technology before, but I don't know exactly what it was. I just think it can't operate properly because the technology that makes it possible to drink dirty water with small straw sounds ridiculous.

But more and more I look into life straw, I started to think it is important. Because it enables drinking water for African children. In Africa, The well is too far from the village and even if they approach there, the water is so dirty that they can't drink it. But, people can't live without water. It means they have no choice. They know that it has many bacteria, germs, and any other dirty substance that harms them. But They have to drink it to live. For this reason, children in Africa desperately need clean water. But in Africa, It is difficult to install purify system, so the small straw will make people drink clean water.

However, I think the price is too expensive for African people. It is 25,000 won. It seems a little bit expensive through size. How can the small straw costs over 2,000 won? But the technology it takes make me understand little bit. But 25,000 won. Do African people who live in a nation that doesn't have enough water like Somalia have spare to buy it? No. Even in Africa, they had a murder because they fought to take the life straw. Also,it is said that the socially disadvantaged, given free of charge, rarely use it properly, and there are many cases where it is sold or exchanged for money before it is stolen or taken away.

So, I think the life straw is a wonderful technology. Because of the technology that we can drink polluted water without a large purify system. And I love the compact size that makes us use it comfortably. But the price that didn't considered the income levels of developing countries made me disappointed.

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My opinion : The reason I think the technology (Lifestraw) is important (20520 김지안)

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My opinion : The reason I think the technology (Lifestraw) is important (20520 김지안)

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I think lifestraw is an important technology. Many people are sick from contaminated water, and I think that such technology will have a great effect on drinking clean water. Also, I hope this technology will develop further and change all the contaminated water in the world cleanly. Then, I think the problem of water shortage can be solved a lot.

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The Reason I Think the Technology Is Important (20507송지훈)

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The Reason I Think the Technology Is Important (20507송지훈)

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The reason why I value life straws is because it can save many people dying due to lack of clean water and make the dirty water clean for people to safely drink.

(제가 생명 빨대를 중요히 여기는 이유는 물이 부족해 죽어가는 많은 사람들을 구하고 더러운 물을 깨끗한 물로 만들어 안전하게 마시기 때문입니다.)

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The Reason Why I Think the Technology is Important (20506 서이환)

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The Reason Why I Think the Technology is Important (20506 서이환)

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The reason why I think the Life Straw is important is because in the poor regions of Africa, many people die to bacteria and diseases in the dirty water they collect and drink but the Life Straw can filter those out and let the people drink the clean water which can save thousands of lives.

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2. [1] By Whom and When Was It Invented (20506 서이환)

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2. [1] By Whom and When Was It Invented (20506 서이환)

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Pettie Petzer and Johan Jonker, invented the Hippo Roller in 1991.

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‘Hippo Roller’ gadget providing access to clean water

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They were inspired by the impact of water crisis and hard child labor in rural environments. Fetching potable water can take most of an entire day, and is typically a chore left to women and children. The Hippo Roller is a simple tool for transporting water from distant watering-holes back to homes and villages. The product is similar to a barrel with a handle that you push ahead of you and has a capacity of 90 liters and it is designed to cope with the rocky and tough terrain so that it would never leak. In the past 15 years, the Hippo Roller Water Project has distributed over 30,000 rollers, benefiting over 200,000 people.

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The Hippo Roller is very easy and simple to operate. All you need to do is pour water into the drum, close the lid, grab the handle, and roll.

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The Reason Why I Think This Technology is Important (20506 서이환)

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The Reason Why I Think This Technology is Important (20506 서이환)

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The Hippo Roller can be a way for people to easily and efficiently transport water over long distances. Although it is quite expensive, it would save you time and hard work so I think it is important.