I'm not an expert on this but I'm speculating "fracking"
Which uses high water pressure to extract the coal.
Answer:
Globalization, or globalisation, is the process of interaction and integration among people, companies, and governments worldwide. Globalization has accelerated since the 18th century due to advances in transportation and communication technology.
<span>Dec 8, 2013 - Alfredo Jaar wants to know: "Are you happy?" ... Yet as you walk by you notice that he is standing in front of a large white chart and it catches your attention. ... Chile was not a happy country in June 1980, when the Chilean artist Alfredo Jaar began taking public surveys for his Studies on Happiness project.</span><span>
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C) After investigation, President Cleveland approved the annexation of the Hawaii Islands.