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THE SHE WILL AUTOMATICALLY CONTROL EACH ONE INDEPEND ENTLY SBMR CERAMIC BROODERS Optimum Flock Performance For a Minimum Gas Consumption three speakers at a recent sympos ium on the University of Mary land campus at College Park. “The greenhouse effect is not a theory,” Alan Miller, executive director of the university’s Center for Global Change, told the audi ence at “Enhancing Community Vitality VII,” an educational event T~ ’ u- V Comfort Zone H S VERTICAL VENTURI _ „ GAS BROODERS unenandoah AGRICULTURAL HEATERS Great for milkhouse, bam Call or workshop „ Check these features: wow Removable access panel for easy access to high limit SCi'VICC switch. . > V our Integral gas pressure tep for quick testing of supplied . gas pressure. Easily removable fan wheel. Quick-change motor mount for speedy field replace ment of fan motors or blower wheels. Pilot light operation for dependable Ignition. Stainless steel thermostat for accuracy and corroeioi resistance. 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In essence, we are liv ing an experiment.” There are indications that sea levels have risen more than three feet in the last 300 years or so, not- Sizo C s ' Ths 110*8 Contot combines a snap* acfon tisrmostat with 100% safsty vafvt it la ealibratad for brooding tompora* Mas tom 78* to 110* Heater Before Winter! 'krll* ■ We Ship UPS ), Saturday, January 6,1990-E3l Lancaster Farmli ed Dr. J. Court Stevenson, a pro fessor at the university’s Center for Environmental and Estuarine Studies. But this rise is not the re sult of a slow and steady increase. “Ocean levels appear to be ris ing at an accelerating almost exponential rale,” he said. “In previous centuries, the sea levels probably rose less than a foot every hundred years. We think the rise over the last century has been more like 1.3 feet.” Maryland is already feeling the effects of rising sea levels. Marsh es, such as the one at the Eastern Shore’s Blackwatcr National Wildlife Refuge, arc being drown ed. And adjacent farm fields are turning into marshes as salt water creeps inland. The stale is at risk of losing up to 80 percent of its wetlands, according to Miller. Stevenson agreed. “The Maryland coast will be changed dramatically by global wanning and rising sea levels. But the effects won’t stop there,” he added. “The whole state will be affect ed one way or another. Waterfront property will be eroded. Ocean City could lose its beach, and groundwater supplies may have to be regulated to ensure sufficient drinking water for Maryland’s growing population.” In addition to raising sea levels, an increase in average global tem peratures even one as small as 1 or 2 degrees Centigrade could cause drastic changes in global weather patterns, according to Miller. Wind and precipitation patterns could be drastically alter ed. Air pollution would worsen, and the ecology of the Chesapeake Bay could experience severe stress. “There’s even a theory, though it’s hard to test,” he noted, “that a rise in temperature will increase the ferocity of hurricanes.” So what can Maryland residents do to prevent this bleak picture from becoming a reality? “We probably won’t be able to prevent climatic changes,” Miller said, “but if we can slow the rate of change, the effects will be less." “Unfortunately, there isn’t a magic bullet, a single solution to the problem,” added Cathy Zoi of the Environmental Protection Agency’s Global Climate Change Division. “But there are lots of small, separate changes and strate gics that can reduce emissions 3 percent here, 10 percent there. Taken together, these reductions can have a large impact.” Energy production, including the burning of fossil fuels and the production of electricity, pro duces/gencratcs/crcates more than half (57 percent) of all greenhouse gases. But alternatives to many currently practiced, environ mentally expensive methods of energy production arc being ex plored or are already available, ac cording to Zoi. These alternatives include ener gy-efficient, cost-effective light ing technologies and photo-scnsi tive windows that can reduce heal ing and cooling losses; also nuclear power and natural gas. “If every home in the United States used natural gas for stoves, heating systems and hot water heaters, we could reduce carbon dioxide emissions 3 to 5 percent,” she said. Methane produced by landfills could also be harnessed as a source of energy This possibility holds great potential for Mary-
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