I live in house where is excellent  acoustics outside, so I hear all what is happening. A year ago a new neighbor settled near me. His balcony is next to mine, so I always hear when he goes outside to smoke. I was wondering, how much cigarettes he smokes a day? So, after a long research it turned out that my neighbor on average smokes 20 cigarettes a day. But last time he started coughing and I'm really worried about him.