Is tobacco sale haram?

My uncle's gas station is one of the only gas stations that sells no pork and no alcohol, and no lottery tickets, (alhamdullilah). It is a very busy store, and I worked there for a couple of months, but I quit thinking because I assumed that the sale of tobacco was haram (forbidden). However, I need the money to support my family and buy a car, because my dad's budget can't get me a car, and I'm not old enough to legally work anywhere else (I'm 15). Is tobacco sale haram, and am I allowed to sell it if it's my only choice?