Complex sentence: Carol O'Niel feels she cannott raise their son Paul to live inside a pressurized spacestation so she feels it would be better for them to leave and go home to earth where they can go outside and breathe real fresh air.
Split into simpler sentences: Carol O'Niel feels she cannot raise their son Paul to live inside a pressurized spacestation. She feels it would be better for them to leave and go home to Earth where they can go outside and breathe real fresh air.