Question

Which of the following is not a reason why mining is important in Canada?




A.


Mining generates 68 billion dollars annually.




B.


Mining produces energy materials such as oil and coal.




C.


Mining provides important minerals such as nickel, zinc, and lead.




D.


Mining allows Canada and the United States to trade needed materials

Answer 1

the answer is a

Answer 2

In Canada, uranium ores first came to public attention in the early 1930s when the Eldorado Gold Mining Company began operations at Port Radium, Northwest Territories, to recover radium. A refinery to produce radium was built at Port Hope, Ontario, some 5000 km away. Radium is one of the decay products of uranium and is therefore found in all uranium ores. As its name suggests it is highly radioactive. It had niche applications in the early part of the 20th century, for example as luminous paint, before the dangers of radiation became widely known. Hence a market for radium existed before uranium was in demand.
Exploration for uranium began in earnest in 1942, in response to a demand for defence purposes. By 1956 thousands of radioactive occurrences had been discovered and three years later 23 uranium mines with 19 treatment plants were in operation. The main production centre was around Elliot Lake in Ontario, but northern Saskatchewan hosted some plants. This first phase of Canadian uranium production peaked in 1959 when more than 12,000 tonnes of uranium was produced. This uranium yielded more in export revenue than any other mineral export from Canada that year.
In response to the development of civil nuclear power, uranium exploration revived during the 1970s, with the focus on in northern Saskatchewan’s Athabasca Basin. The Rabbit Lake, Cluff Lake and Key Lake mines started up 1975 to 1983. Exploration expenditure in the region peaked at this time, resulting in the discoveries of Midwest, McClean Lake and Cigar Lake. Then in 1988 the newly-formed Cameco Corporation discovered the massive McArthur River deposit.
As earlier in Australia, there was a period in the early 1990s when the Saskatchewan government considered phasing out uranium mining in the province, but this policy was abandoned after a joint federal-Saskatchewan study found that the benefits of mining outweighed the impacts, and that any impacts could indeed be minimized. Today the government actively supports uranium mining in the province.
Canada's share of known world uranium resources is currently about 8%, but it produces about one fifth of the mined uranium supply making it the second largest producer in the world behind Kazakhstan. Most uranium is exported, but about one fifth is used domestically.
Canada has made a transition from second-generation uranium mines (started 1975-83) to new high-grade ones, all in northern Saskatchewan, making its uranium mining operations among the most advanced in the world.

Answer 3

ok