The National Geographic Magazine, Volume 215, Issues 1-3National Geographic Society., 2008 - Geography |
From inside the book
Results 1-3 of 29
Page 44
... sands layer , then two tons of the sand itself . It must heat several barrels of water to strip the bitumen from the sand and upgrade it , and afterward it discharges con- taminated water into tailings ponds like the one near Mildred ...
... sands layer , then two tons of the sand itself . It must heat several barrels of water to strip the bitumen from the sand and upgrade it , and afterward it discharges con- taminated water into tailings ponds like the one near Mildred ...
Page 46
... sands are also expected to drop if governments impose constraints to protect the environment . 75 50 50 25 of cubic yards of sediment that once covered the bitumen , thereby bringing it within reach of shovels - and in some places all ...
... sands are also expected to drop if governments impose constraints to protect the environment . 75 50 50 25 of cubic yards of sediment that once covered the bitumen , thereby bringing it within reach of shovels - and in some places all ...
Page 49
... sands . By 2020 , according to the plan , the province's carbon emissions will level off , and by 2050 they will decline to 15 percent below their 2005 levels . That is far less of a cut than scientists say is nec- essary . But it is ...
... sands . By 2020 , according to the plan , the province's carbon emissions will level off , and by 2050 they will decline to 15 percent below their 2005 levels . That is far less of a cut than scientists say is nec- essary . But it is ...
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