Cigarretes produce 84 million tones of CO2 every year, while fireworks in the US produce... 66512 tones of CO2 every year, now lets be VERY generous and let's say we multiply it by 25 (since USA's population is around 300 mil, 300mil*25) aand.. you get 1.6628 million tones (as a hyperbole, since I don't think fireworks are quite as used in Africa and some countries in Asia, and in most countries they aren't used as heavily as in the USA). Just additional information