What is the term for tarry stools?

Where is cabbage grown in the UK? What does this mean 'tamalitos'? What brand of cigarettes does Corey Taylor smoke? How long do you have to stop smoking mariguana before going under anesthesia? What are the long term effects of tobacco use? Did the tobacco culture of Virginia created great pressure for territorial expansion? Is puffing a cigarette dangerous? Should tobacco companies be responsible for their customers actions? Name all the bad things about weed and then all the good? Are cigars safer then cigarettes? What is English tobacco? Does coffee hide the smell of weed? Is skoal edge discontinued? Did bernie mac smoke cigarettes? What ingredient in tobacco that is the main carcinogen? When did they put the message on cigarettes? How many people die from smoking cigarettes every year around the world? What is better for you skoal or grizzley? What is the addictive substance found in tobacco and why is it considered a stimulant? Can smoking cause tumor problems?