Which major retailer's Earth Month initiative in 2009 is credited with reducing plastic bag usage by over 1 billion bags in its first year by introducing a financial incentive for customers?

Sustainability has become a major focus for retailers worldwide, with many launching special initiatives during Earth Month to showcase their environmental commitments. These campaigns not only highlight eco-friendly products and practices but also drive consumer engagement and brand loyalty among environmentally conscious shoppers. Test your knowledge about one of retail's most impactful sustainability initiatives that dramatically changed an industry standard.

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Whole Foods (eliminated plastic bags completely)
Tesco (introduced the 'Bag for Life' program)
IKEA (implemented a 5-cent charge per plastic bag)
Walmart (offered discount for reusable bag usage)