 There are about 2,500 well pads in Pennsylvania, like the one you see behind me. On average, there are about four wells per pad. Currently, there are about 11,500 wells in Pennsylvania, of which 10,000 are actually producing natural gas right now. In 2017, the shale wells in Pennsylvania produced about 5.3 trillion cubic feet of gas, which is about 20% of all the gas produced in the United States. That makes Pennsylvania the second leading natural gas producing state in the U.S., second only to Texas. So along with the gas, these wells produced brine. In 2017, approximately 53 million barrels of brine were produced, and about 40 million of those barrels were recycled for hydraulic fracturing. The advent of recycling brine in Pennsylvania for hydraulic fracturing is really unique. While Pennsylvania is recycling 80 to 90% of the brine generated from shale wells, most other states only recycle about 10 to 20%.