Smoke, drink, eat anything, brethe anything do what every you want, and just remember to drink a lot of water. Clean and pure water. Dont blame me if you drink contaminated water. Water is a purifier of the body. It clenses the entire body, so the more you drink it the more good it will do.
Thanks to nature, the more water you drink the more you will have to pee. So just make sure that you site close to a toilet always and keep a bottle of water and drink upto 2 litres per hour, and pee 1 litre out every half hour. It might look weired among others, but if you try this for some time and preach this to others, everyone will start following it.
Bathe your body with water from the outside, and drink a lot of water to keep your body clean from the insides. Any carbon deposits on your lungs thanks to heavy smoking or breathing polluted air from the outside will all be cleaned spotless by blood that is rich with fresh water, and if you dont drink water, the blood becomes impure and will get saturated and will not be able to much of a good cleaning.
Will your kidney get affected due to heavy peeing? Not sure about that, but the blood purifying organ, the kidnies too get purified with a lot of fresh water, and the more water you take in, the purer your blood becomes, and the concentration of impurities in blood is reduced, so your kidnies has lesser work to do, and that in my theory will increase the life of the kidneys as well.