THE HISTORY OF MONEY [A] The yen‚ the dollar‚ the quetzal‚ or the peso—no matter what the currency is called‚ money is an important part of life in nearly every culture today and has been throughout history. The concept of money dates back thousands of years. Originally‚ money was not metal coins or paper bills. Rather‚ people paid for things with objects that were useful and therefore considered valuable. We sometimes call this commodity money. Some examples of commodity money used throughout
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ABSTRACT A conducting plastic has been used to create a new memory technology which has the potential to store a mega bit of data in a millimeter- square device-10 times denser than current magnetic memories. This device is cheap and fast‚ but cannot be rewritten‚ so would only be suitable for permanent storage. The device sandwiches a blob of a conducting polymer called PEDOT and a silicon diode between perpendicular wires. The key to the new technology was discovered by
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------------------------------------------------- Say no to plastics — Presentation Transcript * 1. SAY NO TO PLASTICS By Dibakar Bose * Plastics is one of the few new chemical materials which pose environmental problem. Polyethylene‚ polyvinyl chloride‚ polyester is largely used in the manufacture of Plastics Plastics is the general common term for a wide range of synthetic or semi synthetic organic solid materials suitable for the manufacture of industrial products .Plastics are typically polymers of high molecular
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Plastic Pollution Introduction The world population is living‚ working‚ vacationing‚ increasingly conglomerating along the coasts‚ and standing on the front row of the greatest‚ most unprecedented‚ plastic waste tide ever faced. Washed out on our coasts in obvious and clearly visible form‚ the plastic pollution spectacle blatantly unveiling on our beaches is only the prelude of the greater story that unfolded further away in the the world’s oceans‚ yet mostly originating from where we stand: the
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Why are plastic bags bad for our environment? Now and days everywhere we go we have waste and a big part of it is plastic bags. Plastic bags are very bad for our environment we find them all over our oceans and on streets. The bags also end up hurting our animals mainly our sea creatures. In general plastics are bad over all they waste money and are bad to our environment. We already have a bad environment over all getting rid of plastic bags would be a good strep to take. We would be helping
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PLASTIC BAGS Introduction One of the most commonly used items in modern generation is the plastic bag. Sufficient‚ convenient‚ strong and cheap‚ plastic bags are seem to be perfect for marketing merchandise‚ foods‚ drinks and more. However‚ there are associated issues with the production‚ use and disposal of these bags which may not be known to most users but which are nonetheless extremely important especially to the environment. To fully understand the ecological footprint of plastic bags‚ determining
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“Paper or plastic?” Perhaps one of the most commonly questions in the past‚ is now rarely heard by consumers. Four out of five grocery bags in the US are now plastic (Reusablebags.com). However‚ the answer should not be merely plastic‚ the real answer is neither. Plastic bags are very harmful for the environment‚ and paper bags even more so. The best alternative is a reusable bag‚ which can save thousands of plastic bags over its lifetime. Plastic bags are everywhere. We see them anywhere
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Ocean Turns Into Plastic Island? Could Happen Have you ever wondered what happens to that plastic bottle or plastic bag that you throw away? What if I told you that the bag and the bottle are slowly killing off marine life and slowly turning our oceans into dumps? This is the case and the problem is only growing and everybody is responsible for it and everybody needs to pitch in and clean up this mess. We all use plastic because it’s convenient for us‚ but in the end it ends up killing the marine
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A plastic shopping bag‚ the most known used product discovered by man. Data released by the United States Environmental Protection Agency shows that somewhere between 500 billion and 1 trillion plastic bags are consumed worldwide each year (National Geographic News‚ 2006). As the number of usage increases‚ the rate of plastic pollution grows eventually to be an immeasurable environmental obstacle that is difficult to control. This essay will unfold the case of plastic bags to identify the outcomes
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“Paper or plastic?” is the age-old question when you reach the end of your grocery-shopping trip. Have you ever wondered which is more environmentally safe? Paper and plastic in comparison have many pros and cons. They both effect our environment and animals positively and negatively. Their similar and contrasting qualities have a great impact on our earth. Plastic comes from oil‚ a hole is drilled and a pipe is inserted into the earth. Oil is forced by the earth’s pressure up the pipe‚ into a
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