In two months I will be 80 years old. As background information, I have been a heavy smoker for more than 30 years. I usually smoked 2 packets of cigarettes a day and on weekends and holidays, I smoked close to 3 packets.
I need to say that during those 30 years I also worked spraying agro-chemicals in the fields from a small plane. At first, this was done with the torso exposed to the air. Later, the cockpit was covered, and this was even more dangerous, because the fumes concentrated in the cabin. These gases are highly toxic. So I got a throat cancer and I had surgery 10 years ago.