When Paul, a nonsmoker, meets his friend Zack, a smoker, for a drink, he is exposed to the smoke released from Zack's burning cigarettes and the smoke Zack exhales. This smoke is known as

Initially, northerners did not want missouri to be included in the union because 1.) maine would not be allowed to enter the union as a free state 2.) missouri wanted to enter the union as a free state 3.) missouri wanted to enter the union as a slave state 4.) maine would not be allowed to enter the union as a slave state