A ban on factory farming could prove to be very helpful to the environment. At first we may struggle a little because the shift away from it will be hard to completely prepare for, but in the end it will help the environment and help keep animals safe and happy for the time they do have.
No, factory farming has not been generally bad for the environment, because it allows farmers to work more efficiently. With factory farming, farmers can produce a lot of food in a little space. This leaves more space that can be returned to nature, and that does not need to be manipulated by humans for food.