Eight states have banned single-use plastic bags from stores, and the results of the bans have been a mixed bag, with some improvement in plastic waste but some lingering problems.

Plastic grocery bags are a significant contributor to global plastic pollution, and California is taking a big step up in tackling the problem.

The U.S. state of California passed a new law banning all plastic bags at grocery store checkouts, following campaigning by Oceana and its allies. In 2014, the state adopted the first statewide plastic bag ban in the country,

California makes a second stab at a ban that actually prohibits plastic bags at grocery stores. Here's what you need to know

Ten years ago, California became the first U.S. state to ban plastic bags. But over the next few years, the state’s landfills actually saw an increase in plastic waste. That’s because a loophole in the state’s bag ban allowed stores to continue offering plastic bags at checkout,