Giving up on tobacco and other addictions are mainly dependent on the individual person who needs to make that decision for himself/herself.
Next Steps
Speak to your father and tell him your concerns. Inform him about the benefits of giving up tobacco products and help him to make a firm decision to give it up.
Health Tips
For a person to give up a long standing addition like tobacco chewing or smoking of cigarettes is not an easy task. If completely giving up these is not possible, at least a reduction in the consumption of these products should be aimed for.