How+do+they+do+fracking?

How do they do fracking?

Deep underground there is a lot of natural gas. The Marcellus Shale Company, which is a natural gas company, is using a technique called fracking. What they do is they drill down 5,000 feet. They put a large pipe in the ground. To force the gas up they use large amounts of sand, chemicals and poisons and flush them down with water. The force from the water and the chemicals eat away at the rock and the gas goes up the pipe. When they have the gas, they take concrete and fill the hole. Do you see any problems with this? Think about the concrete on the sidewalks outside your home or by our school? Also, think about the chemicals that don't stick to the pipe? Where do they go?