The new emphasis on renewable energy presents an array of fuel choices for electricity. The experience can be compared to retail shopping:Coal shops are open most of the time and on schedule. They offer low prices at discount-store levels. But their products and waste are known to create health hazards for people and the environment.

Natural gas shops also have regular and frequent hours. In addition, they maintain on-site staffing during closing times and offer emergency products when other sources fail. Health hazards are minimal, and prices are medium.

Nuclear shops are open all the time except for a one-month period every two years for restocking and maintenance. Medium-priced nuclear products are generally free of health hazards. But these stores do create hazardous waste that is a challenge for disposal services.

Wind stores are open just a fourth of the time on irregular schedules. Open hours are often at night and in winter, when shopping demands are low. Products are healthy, and prices range from low to high depending on location and weather.

Solar shops operate on irregular daytime hours that also vary with location and weather. Prices range from medium to high for products that are not hazardous.

Hydroelectric shops are open most of time with healthy products, but there are relatively few places where they can function. Their large size and operations are a problem for marine life and water supplies. Their low costs are competitive with coal shops.

Legislators will be passing bills that mandate some choices and affect others. What's your choice?ROLF E. WESTGARD, ST. PAUL