Saturday, January 10, 2009
About 92 percent of the coal used in the United States, is for generating electricity. Except for a small amount of net exports, the rest of the coal is used, as a basic energy source in many industries, including, steel, cement and paper. The four major uses of coal are:
FOR ELECTRIC POWER
Coal is used to generate almost half of all electricity produced in the United States. Besides electric utility companies, industries and businesses with their own power plants use coal to generate electricity. Power plants burn coal to make steam, the steam turns turbines which generate electricity.
FOR INDUSTRY
A variety of industries use coal's heat and by-products. Separated ingredients of coal (such as methanol and ethylene) are used in making plastics, tar, synthetic fibers, fertilizers, and medicines. The concrete and paper industries also burn large amounts of coal.
FOR MAKING STEEL
Coal is baked in hot furnaces to make coke, which is used to smelt iron ore into iron needed for making steel. It is the very high temperatures created from the use of coke that gives steel the strength and flexibility for products such as bridges, buildings, and automobiles.
FOR EXPORT
In 2006, 49.6 million short tons, or about four percent of the coal mined, were exported to other countries from the United States. Coal is exported to many different countries, but most trade is with Canada, Brazil, the Netherlands, and Italy. More than half of coal exports are used for making steel.
Coal exports have been generally shrinking in the past 10 years, while the amount of coal imported from other countries has been growing. In 2006, about 36.2 million short tons of coal were imported from other countries. Most of these imports (from Colombia, Venezuela, and Indonesia) were shipped to electric power producers along the U.S. coastlines. Read about a visit to a coal export facility.
Thursday, January 8, 2009
COAL AND THE ENVIRONMENT
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Environmental laws and modern technologies have greatly reduced coal's impact on the environment. Without proper care, mining can destroy land and pollute water. Today, restoring the land damaged by surface mining is an important part of the mining process. Because mining activities often come into contact with water resources, coal producers must also go to great efforts to prevent damage to ground and surface waters.
When coal is burned as fuel, it gives off carbon dioxide, the main greenhouse gas that is linked with global warming. Burning coal also produces emissions, such as sulfur, nitrogen oxide (NOx), and mercury, that can pollute the air and water. Sulfur mixes with oxygen to form sulfur dioxide (SO2), a chemical that can affect trees and water when it combines with moisture to produce acid rain. Emissions of nitrogen oxide help create smog, and also contribute to acid rain. Mercury that is released into the air eventually settles in water. The mercury in the water can build up in fish and shellfish, and can be harmful to animals and people who eat them. The Clean Air Act and the Clean Water Act require industries to reduce pollutants released into the air and the water.
The coal industry has found several ways to reduce sulfur, nitrogen oxides, and other impurities from coal. They have found more effective ways of cleaning coal before it leaves the mine, and coal companies look for low-sulfur coal to mine. Power plants use "scrubbers" to clean sulfur from the smoke before it leaves their smokestacks. In addition, industry and government have cooperated to develop "clean coal technologies" that either remove sulfur and nitrogen oxides from coal, or convert coal to a gas or liquid fuel. The scrubbers and NOx removal equipment are also able to reduce mercury emissions from some types of coal. Scientists are working on new ways to reduce mercury emissions from coal-burning power plants, since the Environmental Protection Agency (EPA) has set tighter mercury limits for the future.
Wednesday, January 7, 2009
RECYCLING IS GOOD BUSINESS!
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Most people know that recycling plays an important role in managing the garbage generated in homes and businesses, and that it reduces the need for landfills and incinerators.
But recycling is far more than a local waste management strategy; it is also an important strategy for reducing the environmental impacts of industrial production. Supplying industry with recycled materials, rather than virgin resources extracted from forests and mines, is environmentally preferable because it saves energy, reduces emissions of greenhouse gases and other dangerous air and water pollutants, and because it conserves scarce natural resources. In 2004, recycling programs supplies industry with over 4.7 million tons of scrap commodities like metals, paper, glass, plastics, wood, organics, and other materials.
Recycling is a growth industry with many kinds of business opportunities, from collection and processing to manufacturing to inventing new technologies.
Tuesday, January 6, 2009
GO GREEN
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10 Ways to Go Green and Save Green
How can we live lightly on the Earth and save money at the same time? Staff members at the Worldwatch Institute, a global environmental organization, share ideas on how to GO GREEN and SAVE GREEN at home and at work.
Climate change is in the news. It seems like everyone's "going green." We're glad you want to take action, too. Luckily, many of the steps we can take to stop climate change can make our lives better. Our grandchildren-and their children-will thank us for living more sustainable. Let's start now.
We've partnered with the Million Car Carbon Campaign to help you find ways to save energy and reduce your carbon footprint. This campaign is uniting conscious consumers around the world to prevent the emissions-equivalent of 1 million cars from entering the atmosphere each year.
Keep reading for 10 simple things you can do today to help reduce your environmental impact, save money, and live a happier, healthier life.
1. Save energy to save money.
Set your thermostat a few degrees lower in the winter and a few degrees higher in the summer to save on heating and cooling costs.
Install compact fluorescent light bulbs (CFLs) when your older incandescent bulbs burn out.
Unplug appliances when you're not using them. Or, use a "smart" power strip that senses when appliances are off and cuts "phantom" or "vampire" energy use.
Wash clothes in cold water whenever possible. As much as 85 percent of the energy used to machine-wash clothes goes to heating the water.
Use a drying rack or clothesline to save the energy otherwise used during machine drying. If you must use a dryer, consider adding dryer balls to cut drying time.
2. Save water to save money.
Take shorter showers to reduce water use. This will lower your water and heating bills too.
Install a low-flow showerhead. They don't cost much, and the water and energy savings can quickly pay back your investment.
Make sure you have a faucet aerator on each faucet. These inexpensive appliances conserve heat and water, while keeping water pressure high.
Plant drought-tolerant native plants in your garden. Many plants need minimal watering. Find out which occur naturally in your area.
3. Less gas = more money (and better health!).
Walk or bike to work. This saves on gas and parking costs while improving your cardiovascular health and reducing your risk of obesity.
Consider telecommuting if you live far from your work. Or move closer. Even if this means paying more rent, it could save you money in the long term.
Lobby your local government to increase spending on sidewalks and bike lanes.
With little cost, these improvements can pay huge dividends in bettering your health and reducing traffic.
4. Eat smart.
If you eat meat, add one meatless meal a week. Meat costs a lot at the store-and it's even more expensive when you consider the related environmental and health costs.
Buy locally raised, humane, and organic meat, eggs, and dairy whenever you can. Purchasing from local farmers keeps money in the local economy.
Watch videos about why local food and sustainable seafood are so great.
Whatever your diet, eat low on the food chain. This is especially true for seafood.
5. Skip the bottled water.
Use a water filter to purify tap water instead of buying bottled water. Not only is bottled water expensive, but it generates large amounts of container waste.
Bring a reusable water bottle, preferably aluminum rather than plastic, with you when traveling or at work.
6. Think before you buy.
Go online to find new or gently used secondhand products. Whether you've just moved or are looking to redecorate, consider a service like craigslist or FreeSharing to track down furniture, appliances, and other items cheaply or for free.
Check out garage sales, thrift stores, and consignment shops for clothing and other everyday items.
When making purchases, make sure you know what's "Good Stuff" and what isn't.
Watch a video about what happens when you buy things. Your purchases have a real impact, for better or worse.
7. Borrow instead of buying.
Borrow from libraries instead of buying personal books and movies. This saves money, not to mention the ink and paper that goes into printing new books.
Share power tools and other appliances. Get to know your neighbors while cutting down on the number of things cluttering your closet or garage.
8. Buy smart.
Buy in bulk. Purchasing food from bulk bins can save money and packaging.
Wear clothes that don't need to be dry-cleaned. This saves money and cuts down on toxic chemical use.
Invest in high-quality, long-lasting products. You might pay more now, but you'll be happy when you don't have to replace items as frequently (and this means less waste!).
9. Keep electronics out of the trash.
Keep your cell phones, computers, and other electronics as long as possible.
Donate or recycle them responsibly when the time comes. E-waste contains mercury and other toxics and is a growing environmental problem.
Recycle your cell phone.
Ask your local government to set up an electronics recycling and hazardous waste collection event.
10. Make your own cleaning supplies.
The big secret: you can make very effective, non-toxic cleaning products whenever you need them. All you need are a few simple ingredients like baking soda, vinegar, lemon, and soap.
Making your own cleaning products saves money, time, and packaging-not to mention your indoor air quality.
11. Bonus Item! Stay informed about going green. Sign up for our weekly newsletter or subscribe to World Watch, our award-winning magazine.
Monday, January 5, 2009
Digital TV Converter Coupons Coveted
Today the National Telecommunications and Information Administration, which is running the coupon program, said it is nearing the program's $1.34 billion funding limit. That means people trying to order coupons will be placed on a waiting list until more funds become available. Here's a story with more details.
Each $40 coupon expires after 90 days. Unredeemed coupons are redistributed to other households that need them. But by the time those coupons become available, millions of analog TVs may already be dark. Coupon orders have been at record highs over the past week.
If you have an analog TV that is not hooked up to cable or satellite service, you will need a converter box in order to keep watching TV.
At this point, Congress will have to step in to give the NTIA more money. It's also possible that the NTIA will seek dollars from the stimulus plan to keep it going.