[ 109 ] Earth and Space Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • On the map, the circles indicate locations of earthquakes caused by or related to energy technologies. The larger the circle, the larger the earthquake. Mmax Activity Oil/Gas Extraction <3.0 3.0–4.0 Secondary Recovery 4.0–5.0 Wastewater Injection 5.0–6.0 Geothermal 6.0–7.0 Hydraulic Fracturing (Shale Gas) >7.0 What is the activity in the key that results in earthquakes with the greatest magnitude? According to the information in the passage, which of the following statements best describes concerns about the possible sustainability of hydraulic fracturing? A. Ongoing fracking could pollute the air. B. The potential for earthquakes is increasing. C. Fresh water supplies in shale outcroppings are scarce. D. Gas and oil surpluses cause less reliance on wind and solar resources.