41.   Some fires started naturally by lightning or spontaneous combustion, others as a result of coal mining.

42.   Texas Utilities also has subsidiaries in telecommunications, coal mining and energy.

43.   The commission regulates the oil and gas industry, gas utilities, surface coal mining and some aspects of railroads.

44.   Their father had dug tunnels through the Italian Alps and then come to America for the big money and heady glamour of American anthracite coal mining.

45.   Thirty-five percent thought encouraging more oil and gas drilling, coal mining, and construction of nuclear power plants was a better solution.

46.   This time, he does not see a future in coal mining.

47.   While coal mining or oil and gas exploration can be denied leases based upon environmental concerns, not so with hardrock mining.

48.   You can even learn about coal mining.

49.   Both accidents occurred in the northern Quang Ninh province, where coal mining is one of the most important industries.

50.   Cimoszewics, who arrived Monday for a three-day visit, said the two countries will study cooperation in coal mining and infrastructure development.