I'm so sorry to hear about your BIL, I hope he has a successful treatment and recovers from kidney cancer. My uncle was born with one kidney, and didn't know it until he was an adult. He's 74 now and he's fine with just the one.
I have never been a smoker, so I don't know what it's like or how addictive it is or how difficult it is to quit. I know that it us very hard to quit once you start. I have 2 kids 32 and 34, and they both smoke, it breaks my heart and it worries me all the time. My son coughs at night, it sounds horrible. My daughter gets bronchitis bad about twice a year and is susceptible to it because of her smoking. One thing I don't understand is I come from a family of 5 siblings, none of us smoke, my parents never smoked, my grandparents never smoked, and none of my aunts and uncles, my hubby comes from a family of 4 siblings, and he's the only one who never smoked, both his parents smoked, all 7 of his uncles smoke, and his siblings and their spouses all smoke. My kids who were never exposed to it, or saw its growing up, both smoke and started very young. My daughter first smoked when she was 14 years old, and can't quit, my son was about 16 years old.
My 7 nieces and nephews on my hubby's side all grew up in the 80s when people smoked in the house and were around it all their lives, none of those kids smoke? I know 7 people in my life who are sick or who have passed away due Tao smoking in the last 5 years. My step mom died 5 years ago from brain cancer, the doctor said it was smoking related, my aunts boyfriend has COPD, and can no longer breath without a machine, and he also has bladder cancer, my step father is being treated for bladder and kidney cancer right now from years of smoking, he quit years ago after a heart attack at the age if 42. My SILs father just passed away a couple of years ago from lung cancer, he left an only daughter and his granddaughter. It's so sad, and my kids see this but they ignore what I say and get annoyed when I talk about it. They also have the attitude nothing will happen to them. Ugh.
Congratulations to all of you who have been able to quit, it's a very difficult thing to do.