A BEST bus conductor smacks tobacco on his palm. Anti-tobacco drives by BEST have failed in the past, with employees going right back to their old habits. File Pic

For BEST bus employees, smoking and chewing tobacco will not just choke their lungs but also wreck their careers, as the Undertaking is mulling over a new HR policy in which tobacco users will find it hard to get a job or a promotion unless they give up on the habit.