I've been hearing that wind power is going to play a significant role in our energy future. What's the story?
—Dorothy Raffman, Norwalk, CT
Wind energy is zero-emissions energy, a renewable resource that many environmentalists and alternative energy proponents feel is one of our last, best hopes for staving off devastating climate change. According to the American Wind Energy Association (AWEA), the average wind turbine can prevent the emission of 1,500 tons of carbon dioxide each year.
Globally, wind energy has grown 500 percent since 1997. In 2003, 8,133 megawatts of wind-generating capacity were installed worldwide, according to a recent joint announcement from AWEA and the European Wind Energy Association (EWEA). This brought the world's total wind power generating capacity to 39,294 megawatts, enough to power 19 million European households, according to EWEA. World wind leaders include Germany, the U.S., Spain, Austria and India, each with more than 1,000 megawatts. A number of other countries, including the Netherlands, Italy, Japan and Great Britain, are nearing the 1,000-megawatt mark.
In the United States, there are now wind energy installations in almost every state west of the Mississippi, and in many Northeastern states. California leads with more than 2,000 megawatts of installed wind energy, followed by Texas with nearly 1,300 megawatts. In total there were nearly 6,400 megawatts of wind power in the United States as of January 2004, enough to power 1.6 million U.S. homes, and up 50 percent from the installed capacity in the U.S. at the end of 2001, says AWEA.
Which are better for the environment, disposable or cloth diapers?
White Lake, MI
The "disposable versus cloth" debate has raged among environmentalists for years. Non-degradable disposable diapers can sit for decades, even centuries, in landfills and require thousands of tons of plastic and hundreds of thousands of trees to manufacture. However, the water and chemicals used to clean cloth diapers, and the fossil fuels diaper services consume to transport them, suggest that their relative environmental impact could be a wash.
However, modern advances in water—and energy-efficiency in washing machines and dryers have reduced the environmental impact of diaper laundering. Concerned parents should also consider the issue of sewage. The urine and feces in disposable diapers enter landfills untreated, possibly contaminating the ground water supply. Whether cloth diaper waste is flushed down the toilet or removed in the washing machine, that dirty water will enter a sewer system and, most likely, a wastewater treatment plant.
Also, John Shiffert, executive director of the National Association of Diaper Services (NADS), points out that the chlorine byproduct dioxin, a carcinogen, has been found in trace amounts in disposables.
Those concerned about the environment who want the convenience of disposables can try Nature Boy and Girl, which makes a competitively priced, cornstarch-based diaper that can be composted. Using flushable cloth diaper liners, made by Tiny Tush and other companies, means only the thinnest—and messiest—part gets thrown away. Parents who want to use cloth diapers can hire a cleaning service to do the dirty work. Their numbers have rebounded in recent years. Check the yellow pages, or contact NADS to locate a service in your area.
Are there prepared lunches comparable to Oscar Mayer "Lunchables" that are healthier and more environmentally friendly?
Oscar Mayer's Lunchables are a hit with youngsters because of their bright packaging and fun-to-eat snacks. However, like much of the junk food marketed to children today, behind those colorful boxes and tasty treats lies a spectrum of potential health disasters. The Center for Science in the Public Interest (CSPI) offers 10 tips in creating a nutritional lunch, and one of them is "Don't send Lunchables," because the snacks derive "two-thirds of their calories from fat and sugar."
CSPI also includes Lunchables among their list of the "Top 10 Foods to Avoid" because, "It would be hard to invent a worse food than these combos of heavily processed meat, artery-clogging cheese and mostly-white-flour crackers. The regular (non-lowfat) line averages 5 1/2 teaspoons of fat (that's 60 percent of calories) and 1,734 milligrams of sodium."
Moreover, Lunchables' form of attractive packaging is environmentally unfriendly. It consists of a plastic tray cut into various compartments, which is then sealed with a transparent and flexible film. This tray is then placed in an outer cardboard box. All this makes it very difficult to recycle.
Currently, as there are not many known alternatives to such prepared foods, CSPI suggests packing one's own lunch and snacks, which would be more environmentally friendly and far healthier for your children. In addition, CSPI offers tips on preparing a healthy lunch, such as leaving out the cheese altogether (or using low fat of fat-free cheese), adding vegetables to sandwiches, using low-fat crackers, using whole-grain bread instead of white bread, including fruit or juice (100% juice only), and using one percent or fat-free milk.