But when you ban plastic bags, people still use plastic bags. They actually buy thicker plastic bags instead of reusing the grocery bags. "What I found was th

But when you ban plastic bags, people still use plastic bags. They actually buy thicker plastic bags instead of reusing the grocery bags. "What I found was that sales of garbage bags actually skyrocketed after plastic grocery bags were banned," she says. This was particularly the case for small, 4-gallon bags, which saw a 120 percent increase in sales after bans went into effect.