Idling cars in montana

Is it Illegal to Idle and Warm Your Vehicle in Montana?
Is it Illegal to Idle and Warm Your Vehicle in Montana?
Is it Illegal to Idle and Warm Your Vehicle in Montana?
The temps in Billings are dropping to 9 degrees tonight.   And a cold winter is ahead of us. I don’t have a remote start on my car, but I’m thinking I need one. It’s quite lovely getting in a warmed car on a bitter cold day. But is it legal to let you...