Why doesn't Walmart have bags anymore?

I've noticed that Walmart has stopped providing plastic bags for customers at checkout. I'm curious, what's the reason behind this change? Is it an environmental initiative to reduce waste and promote sustainability? Or is it a cost-saving measure for the company? And how are customers adapting to this new policy? Do they bring their own bags now, or are there any alternative options available for those who forget? It would be interesting to hear more about the motivation behind this decision and how it's impacting both customers and the environment.