Looking out the window of his Ford truck, Bob Fitzgerald sees large, undesirable plants growing in the fields. Visitors to his neighborhood in Princess Anne, Maryland mainly see dying forests and empty farmland. Fitzgerald says the land has been in his family since the 17th century. "I'd say in the next 20 years, you're going to lose a very high percentage of that land, that's going to be unfit to farm." The land around the Chesapeake Bay has been sinking for hundreds of years. But climate change is making things worse. As sea levels rise, salt water is entering rivers and other waterways. As a result, the ground is becoming too salty for crops to grow. Maryland's Eastern Shore is home to some of the oldest farms in North America. Fitzgerald's dates back to 1666. He says he has seen big changes during his life.