Can HIS smoking weed affect me becoming pregnant?

Please no insults, I don't really care what you guys think is morally right or socially acceptable. I just want to know if his smoking will cause me to not be able to become pregnant. He smokes about once a day and has for about two years. Any help that doesn't have to do with the fact that its illegal or whatever other kind of insult that can be thrown would be greatly appreciated. We aren't stupid also. None of this will be in the house from the moment I find out if I am pregnant or not.