need help from law enforcement ladies!

Ok, this is hard but I need advice. I'm a married stay at home mom for 3 years now. Everything was perfect in the beginning, no heavy drinking behavior or recreational drugs or any sorts. After a year of marriage he start to drink a drink a lot and now (to present days) he turned our basement into a grow room for marijuana, which I don't approve. With have 3 kids under 3. And we've been fighting a lot. I personally don't drink or smoke. And I don't approve him turning the house into a grow facility for pot but he pretty much said he doesn't care if I like it or not. Because I'm scared if he gets busted, it will affect me and my children because we live in that stupid house and they will take them away (CPS) because he grows pot. Please note that our kids have no access to the grow room at all. Anyway, our relationship is really bad and getting worse day after day for many reasons like cheating, emotional abuse etc... I want to leave him but he threaten me that he won't let me leave with the kids and that I won't have them. I told him I will bust him and his grow room.And he said if I tell the cops on him, I will get in trouble too and they will take the kids away. I don't know what to do :( il pretty much defeated from all sides. I cannot leave, and if I try he won't let me have the kids. If I bust him, he will say I'm his accomplice that I help him grow marijuana. I'm so scared I will lose my kids. I have no where to go or no one to ask help for. My family lives overseas and it's just me and him. I hate my situation and don't know what to do. Please help! Can I get in troubles if I report him? Will I lose custody of my children because he grows marijuana in the basement of the house?