The National Geographic Magazine, Volume 215, Issues 1-3National Geographic Society., 2008 - Geography |
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Page 44
... percent of its total foreign supply , and around half of that now comes from the oil sands . Anything that reduces our dependence on Middle Eastern oil , many Americans would say , is a good thing . But claw- ing and cooking a barrel of ...
... percent of its total foreign supply , and around half of that now comes from the oil sands . Anything that reduces our dependence on Middle Eastern oil , many Americans would say , is a good thing . But claw- ing and cooking a barrel of ...
Page 54
... percent of the total area - into dust , dirt , and tailings ponds . Expan- sion of in situ extraction could affect a ... per- cent of the forest . McEachern , who works for Alberta Environ- ment , a provincial agency , says the tailings ...
... percent of the total area - into dust , dirt , and tailings ponds . Expan- sion of in situ extraction could affect a ... per- cent of the forest . McEachern , who works for Alberta Environ- ment , a provincial agency , says the tailings ...
Page 67
... percent . If we turned off home computers when not in use , we would cut their CO2 impact by 8.3 million tons a year , or 50 percent . CO , AMOUNTS MEASURED IN METRIC TONS THE BRITISH THERMAL UNIT ( BTU ) IS USED TO MEASURE THE ENERGY ...
... percent . If we turned off home computers when not in use , we would cut their CO2 impact by 8.3 million tons a year , or 50 percent . CO , AMOUNTS MEASURED IN METRIC TONS THE BRITISH THERMAL UNIT ( BTU ) IS USED TO MEASURE THE ENERGY ...
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