husband smokes, thoughts on TTC??

my husband smokes, roughly around 10 cigarettes a day, plus a cigar now and then. i smoke a few puffs of his maybe a few times a week. he told me that when we move house we can start trying to conceive(!!) which probably isnt going to be for a few months but i just wanted to get some opinions on smoking/secondhand smoke while TTC and/or pregnant. i know it can be dangerous but i've also known women who have smoked through pregnancy and have had perfectly healthy babies. i know my husband isnt going to want to quit and i dont particularly want to bring it up if it's going to upset him or make him mad. any advice on how to talk to him about it? or any ideas on what to say? or would it be okay to just let him carry on and not say anything?? no hate please, im just trying to do right...