Where I live supermarkets now only have paper bags or sturdy multi-use bags.
There will also be some EU wide legislation pretty soon.
The bigger supermarkets (Kroger, etc.) all default to using single-use plastic. They will give you paper bags if you ask, and of course you can bring your own but it doesn't seem very common.
As long as the markets provide disposable bags free/cheap, people will tend to do that out of convenience.
Anecdotally, the fee seems to work well in both places, or at least single-use plastic bag use seems relatively low as most people seem to bring a reusable bag or use a backpack or similar.
[1] https://www.gov.uk/guidance/carrier-bag-charges-retailers-re...
https://assets.ctfassets.net/bffxiku554r1/4TNPmg4tzrgoH39Iev...
You kind of have to explain yourself to the cashier if you want a plastic one.
If norwegians care so much about the environment or climate change, let them take out their oil platforms first.
Personally I agree that we should stop the oil and gas extraction as the more oil stay in the ground the better, and the country is split about 50/50 on this issue.
Unfortunately, the major parties have been against so far but the conservatives are finally starting to debate it internally and if they come down on the planned phase out of oil and gas it will happen. The major left wing parties are not interested so far.
There has been some movement the in the legal route, the supreme court recently declared some recent exploration licenses invalid due to a clause in our constitution, however we'll see how long that ban lasts.
In any case, not being fast enough in one area does not mean you have to pollute max in other areas.
Turns out there's a black market for plastic grocery bags.
Anecdotally, 100% of grocery-store plastic bags I get are reused as trash bags and doggy poop bags. Same for most other people I know. Very few actually get thrown away after one use. And as it turns out, people in areas where such bags are banned, they buy other kinds of plastic bags to use for those purposes.