ROCK SPRINGS, Wyo. — The FMC Corporation, which annually mines the most trona in the world, is playing it safe with a longwall-mining project that could cause ground subsidence in areas with gas ...
GREEN RIVER - Federal officials are proposing to put just over 300,000 acres of trona mineral estate within the heart of the trona-rich Green River Basin off-limits to oil and gas drilling to protect ...
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