Friday, January 22, 2016

Cobalt: The Most Deadly Element?

Cobalt may seem innocent, peacefully hidden near the center of the periodic table, but in reality this element, commonly known for the beautiful blue pigment it produces, is deadly.

The name cobalt is sinister in itself. It comes from the German word for the element, Kobold, which means “goblin” or “evil spirit.” German miners gave cobalt this name since mining cobalt was very dangerous. Mining any element is hazardous to some degree but cobalt is particularly nasty since a toxic gas (arsenic trioxide) often occurs with cobalt in nature
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Cobalt is still mined today, mainly for use in smartphones. No doubt modern miners there would agree that Kobold is a suitable name. Cobalt miners, often children, work in perilous conditions, risking permanent lung damage earning about a dollar a day. Cobalt is in high demand due to its value as a component of super alloys, metal alloys that resist rusting and retain their properties at high temperatures. Super alloys have a variety of uses including forming parts of electronics and jet engines.

Cobalt isn’t only dangerous to miners. Cobalt-60, a radioactive isotope of cobalt, could potentially wipe out the entire human race. Leo Szilard, a scientist who worked on the Manhattan Project, figured out that an explosion of a cobalt-60 dirty bomb would kill all life in the vicinity of the explosion once it exploded, and would continue killing all life that ventured in the area for about 90 years. A cobalt-60 dirty bomb kills with heat like a normal nuclear bomb, but it has a hidden weapon that keeps it deadly for decades: gamma radiation.

A plastic isotope container containing cobalt-60
image used under creative commons

Most radioactive elements emit gamma rays for a few days, but cobalt is special. It keeps emitting deadly gamma rays for decades. These gamma rays mix up the chromosomes in our white blood cells either killing them or giving them cancer, making us vulnerable to disease. Szilard estimated that if one tenth of an ounce of cobalt-60 was sprinkled over every square mile of earth, all of humankind would perish. Thankfully no one has attempted to make cobalt-60 nuclear weapons yet, as far as we know.

Cobalt-60, despite its dangers, can also be used to help humans. Its radioactive properties are used to treat cancer, preserve food through food irradiation, and produce powerful X-rays to see through metals.

These are modern uses of cobalt, but humans have been using non-radioactive isotopes of cobalt since ancient times. Back then, cobalt was mainly used for dye. The ancient Chinese used cobalt blue in their pottery glazes. The ancient Egyptians probably used cobalt too since a small glass object colored with cobalt was found in Pharaoh Tutankhamen’s tomb. In addition to producing pretty blue dye, cobalt is one of the three naturally occurring magnetic elements
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The alchemists used cobalt in their experiments, but they attributed its properties and beautiful blue color to copper or bismuth. It wasn’t until 1730 that Georg Brandt discovered cobalt to be a unique element making cobalt the first element discovered that the alchemists hadn’t already isolated and named.
Cobalt Blue
a public domain image

The earliest use of cobalt, long before Georg Brandt or even the ancient Chinese, is the element’s use in the human body. Cobalt is vital to human health as a trace metal. We need it to form enzymes and produce vitamin B-12. It’s kind of crazy that one isotope of cobalt could kill us all, but we need another to survive.



Friday, January 15, 2016

Obesity and Climate Change

Obesity and climate change. They may seem worlds apart, just two separate issues we happen to be dealing with at the same time. But, maybe they are not separate issues. Can a case be made that obesity and climate change are intertwined, each feeding off the other? Let’s find out.


Author's own image.

The cycle starts with hungry people living in our modern, hectic world. These people, like all hungry people, want to feed themselves and their families with the best food possible, but they are busy and preparing a meal takes time. Time they can’t afford to spend in the store and over the stove. The fast food place around the corner is more convenient - it takes thirty minutes or less to buy and eat dinner and leaves no kitchen mess to clean up. Perfect for busy days when a home-cooked meal is not an option. Weeks full of busy days pass, and fast food becomes a habit.


Author's own image.


Meanwhile, the fast food companies prosper, providing their customers cheap food served in a minute or two. All that matters is speed, who cares about production that wastes resources and energy? Disposable plates and plastic cups, bowls and utensils make clean up easy. How convenient!

What is the cost of that the convenience? How often do we question where this plastic comes from or wonder where it goes? Raising livestock in green pastures takes too long, so instead, the animals are crammed in small lots and pumped full of grain and drugs until they’re fat enough to be slaughtered for food. The food is prepped in factories, chemists manufacture its aroma and flavor, and the product of this manipulation, the “food,” is pumped full of preservatives to keep it fresh for the long journey from factory to restaurant.


Author's own image.

The low cost of fast food, the speed at which it is produced - these benefits aren’t free. The food quality is lowered, resulting in food that is bad for us, the consumers. We’ve heard about the many ways fast food harms our bodies, but we tend to forget is that fast food is equally bad for the earth.


Author's own image.

Let’s start at the essence of fast food, cheap meat. Producing this meat contributes to global warming. Livestock are big polluters, their flatulence releases greenhouse gases into the atmosphere. All animals have flatulence and the atmosphere can handle it, but the quantities of livestock needed to sustain our fast-food habit is the problem. In addition, raising this multitude of cattle requires room. A huge amount of room on land. That land often comes from cleared forest, including the Amazon rainforest.

Once the meat, and other fast food ingredients, are produced they need to be shipped to a factory that will transform them into fast food. After the fast food is restaurant ready, it needs to be shipped from the factory to a fast food restaurant. All this shipping uses up fossil fuels. Use of fossil fuels releases carbon dioxide, a greenhouse gas that contributes to global warming, into the environment, as well as sulfur dioxide, a major pollutant.

Despite the harm they are doing, fast food companies have not significantly reduced their impact on the environment.
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Author's own image.
This is just the food’s side of the story, what about all the disposable plastic fast food is packaged in and served on? All that has to come from somewhere and it has to go somewhere too. Plastic is made from fossil fuels in a process that releases countless pollutants into the environment. Once plastic is made, it never biodegrades. Some plastic can be recycled, but plastic wrap, bottle caps, and straws can’t. Styrofoam, another packaging option used in fast food, can’t be recycled. In addition, all plastic used in mass food production has to be absolutely new. Recycled plastic is poor in quality and doesn’t meet the qualifications of food grade plastic. We have to produce new plastic just so we can use it once and throw it away.
Author's own image.

Plastic can only be reused if it’s put in a recycling bin, and often it is not. Just on a short walk around my neighborhood I saw large amounts of fast food waste littering street corners and a vacant lot. Maybe this plastic will end up in the river, and from there get swept out to sea to become part of the great Pacific garbage patch. Maybe it will be eaten by an animal, and then the plastic could get stuck in its digestive system. Plastic eaten by animals often prevents them from digesting and absorbing actual food and they die from malnutrition. If someone does pick up the litter, it will be put in a plastic bag and shipped off to a landfill, which isn’t much better since it won’t biodegrade there any more than it will in the ocean or in an animal. Plastic in landfills can leech chemicals into the soil resulting in soil and groundwater pollution.


Author's own image.

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While all this pollution is going on, the hungry people have gotten even busier. Most people have to drive everywhere, using oil and releasing greenhouse gases as they go. It’s hard to find time for exercise anymore. Most cities and towns are designed around cars, and people who do want to walk to work can’t because highways are in the way. Fast food and sedentary lifestyle is messing with our systems. As people gain weight, physical movement becomes harder and driving becomes even more of a necessity.
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It seems easy to stop eating fast food, just head to the grocery store, pick up some food and cook. But there’s a problem. Fruit, vegetables, whole grains, and dairy products often are expensive when compared to fast food. Far more expensive than anyone expected. Why is this? What happened?

Author's own image.

Now, the supply of good food is low and pricey. The hungry people buy what they can, but they can’t spend all their money on food. Gas is expensive, rent costs money, taxes need to be done, winter clothes are a must. Back in the car, back to Burger King.

Some of the hungry people have enough money to budget and buy produce, grains, dairy and meat. They can afford to spend time cooking. Not everyone has this option. In some areas grocery stores are disappearing, and fast food chains spring up in their place. People who have spent their whole lives eating ready-cooked meals, may not know how to cook their own, and they may not have a store nearby where they can buy healthy groceries. This sort of situation is known as food insecurity and is becoming common.

The world’s population is increasing year after year which means we’ll be producing more fast food. All the environmental havoc produced by fast food will just become more catastrophic if we keep producing food in the same way we do now.
Author's own image.

The cycle doesn’t seem to end.

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What is the answer? How do we end the cycle? Maybe it’s as simple as starting to be aware of how our actions effect the earth and ourselves.

Making a decision to be aware can make a big difference in itself. Once you’re aware, questions will pop up and hopefully, so will solutions.

It may seem like eating an apple instead of a burger from a fast food chain, or avoiding plastic utensils doesn’t change much. But these little steps are the important because they will start to change our minds and attitudes.