Which geographic region first introduced widespread retail 'plastic bag taxes' that successfully reduced single-use plastic consumption by over 90% in major retail chains?

The retail industry has been increasingly focused on sustainability, with some geographic regions leading the charge in innovative eco-friendly practices. This trivia question explores how different regions are implementing sustainability initiatives in retail spaces, reshaping customer experiences and brand loyalty through environmental consciousness. Test your knowledge about which geographic area has been at the forefront of a particular sustainability practice in retail!

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Ireland (2002)
California, USA (2007)
Denmark (1994)
South Australia (2009)