Why did they start banning plastic grocery bags everywhere?
user
It’s due to the threat of a plastic pollution crisis.  The ocean is already filled with floating plastic, and we’re using plastic bags way too much.
assistant
Why did they start banning plastic grocery bags everywhere?
user
You may be thinking of a 2017 public health campaign from Ireland called “Bag it”.  This campaign was not “everywhere”, and it did not ban all plastic grocery bags.  Instead, it had three main goals: first, to encourage people to choose paper bags over plastic grocery bags; second, to encourage people to use their bags multiple times (like reusing it to carry vegetables home from the farmer’s market); and third, to raise awareness about the number of disposable plastic bags that are generated each year.
assistant
Why did they start banning plastic grocery bags everywhere?