Yes. Stop smoking ASAP though.
I smoked for 18 years and then have done on and off for 5 years (2 years of then a few months here and there). I no longer smoke at all.
You will struggle with intensity work now and your HR will be through the roof for Z3 efforts. You will not believe the power you put out for the same HR when you quit (or how much less effort it is for the same watts).
Plus you won’t smell 
When I look at ‘time spent in zone’ on TP after sessions the power and HR graphs are now the same. Previously they would be, say,
Power
25% Z1
60% Z2
15% Z3
HR
5% Z1
35% Z2
60% Z3
Now they match.