All chemical components of oil and gas are _________________________,

QUESTION

TEST 2All chemical components of oil and gas are _________________________, meaning they are composed exclusively of the elements _____________ and ____________________In recent years, the Marcellus shale in Pennsylvania and surrounding states has been increasingly exploited for its _______________ as an energy source. Because shale is a much more difficult rock to extract resources from, the technique of _______________________________ has been used. Recent controversy over this technique has emerged, as evidence suggests that it is associated with contamination of waterTEST 2The black color of soil and the fertility of soil are mostly determined by the quantity of organic material, or ___________________, in the top soil layer.Breakdown of rocks happens through ______________ weathering, ____________________________ weathering or _________________ processes.The formation of petroleum initially requires deposition of organic-rich sediments in a ________________________ setting. The formation of coal initially requires deposition of organic-rich sediments in a _______________________ setting.How many pounds of grain does it take to produce one around of protein from cattle?What mining practice was outlawed in 1884 in the first environmental lawsuit?

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