First of all, the only thing that's affected in terms of takeout is a particular kind of packaging that's used that is very, very difficult to recycle and does end up in the environment. It's called polystyrene.
Second, with respect to plastic bags, there are readily available alternatives. For one, there are reusable bags, which many Canadians are using these days, but in their absence, there are paper bags. There are a whole bunch of different things you can use that are not plastic grocery bags.