The tobacco and cigarette business

What does Islam say about the tobacco or ciagrette business?

Actually I am a Director Sales & Marketing of world renowned tobacco group and some of my islamic brothers told me that it is Makroh e Tehrimi (close to Haram), you are selling cancer stick, you will be asked because expanding heart diseases and cancer.
This is right that I am expanding sales as given by company targets. The more my team sells the more company business grows.

Kindly send me answer in detail because I am very much curious about my job. My salary came from Tobacco Company and all my family living expanses paid by this.