kim windon works for shell.t's her job to convince the public that drilling for gas is the way to go. >> it's very plentiful and we've learned over the years that it's something we can explore for and develop both safely and responsibly. >> but others in the area disagree. this platform is located near wellsboro, on a farm owned by carol johnson. >> as he is a little soft, but it is kind of weather in the spring anyway. >> today there's just a bit of tar left. but about a year ago, this field area was suddenly covered in some kind of fluid -- and carol's cows drank from it. >> the thing that happened was, we lost these calves. >> and how long did it take you to figure out what the reason was? >> about the second calf. >> in the end, she lost eight calves. to understand what happened, one has to understand how fracking works. in fracking, the drillers dig straight down, and the steel casing is surrounded by several cement layers. after about 2 kilometers, the drill turns sideways and penetrates the rock, which ho