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In 2015, video of a marine biologist pulling a plastic straw out of a turtle's nose sparked outrage worldwide and countries and cities started banning them, starting with the Pacific Island nation Vanuatu and Seattle in 2018.

Though they pollute oceans and harm marine life, Republican President Donald Trump signed an executive order this month to reverse a federal push away from plastic straws. He declared paper alternatives "don't work" and don't last very long.

Here's what to know about the larger fight over single-use plastics in the United States:

What happens to plastic straws?

More than 390 million plastic straws are used every day in the U.S., most for 30 minutes or less, according to advocacy group Turtle Island Restoration Network.

They usually are thrown away after one use, going on to litter beaches and waterways and potentially killing marine animals that mistake them for food.

The straws are not recyclable because they are so small, and they take at least 200 years to decompose, the network said.

They break down into incredibly tiny bits of plastic smaller than a fraction of a grain of rice. These microplastics have been found in a wide range of body tissues.

Though research is still limited overall, there are growing concerns that microplastics in the body could potentially be linked to heart disease, Alzheimer's and dementia, and other problems.

Trump's executive order claims paper straws use chemicals that may carry risks to human health and are more expensive to produce than plastic straws. Researchers from the University of Antwerp found forever chemicals known as PFAS to be present in paper, bamboo, glass and plastic straws, but not stainless steel ones, according to a 2023 study.

The advocacy group Beyond Plastics said that while plastics are often cheaper than paper products, the cheapest option is to skip the straw.

Judith Enck, a former Environmental Protection Agency regional administrator who now heads up Beyond Plastics, said she hopes that people react to the executive order by committing to using fewer plastic straws and that local and state governments do, too.

"It's easy to just kind of almost poke fun of this, ignore it," she said Tuesday. "But this is a moment that we as individuals and state and local policymakers can make a statement that they disagree with this executive order and are committed to using less plastic straws. It's not that hard to do."

Several states and cities banned plastic straws and some restaurants no longer automatically give them to customers.

What is being done globally?

Democratic President Joe Biden's administration committed to phasing out federal purchases of single-use plastics, including straws, from food service operations, events and packaging by 2027, and from all federal operations by 2035.

The declaration came in July, just a few months before negotiators met in South Korea to try to finish crafting a treaty to address the global crisis of plastic pollution. Talks resume this year.

Under the Biden administration, the U.S. at first stated countries should largely develop their own plans instead of abiding by global rules. China, the U.S. and Germany are the biggest players in the global plastics trade.

The U.S. changed its position heading into South Korea. The delegation said it would support having an article in the treaty that addresses supply, or plastic production. More than 100 countries want an ambitious treaty that limits plastic production while tackling cleanup and recycling.

U.S. manufacturers asked Trump to remain at the negotiating table but revert to the old position that focused on redesigning plastic products, recycling and reuse.

Aren't other plastics a problem?

The environment is littered with single-use plastic food and beverage containers — water bottles, takeout containers, coffee lids, straws and shopping bags.

Every year, the world produces more than 400 million tons of new plastic. About 40% of all plastics are used in packaging, according to the United Nations.

In 2023, Ocean Conservancy volunteers collected more than 61,000 plastic straws and stirrers polluting beaches and waterways in the U.S. There were even more cigarette butts, plastic bottles, bottle caps and food wrappers, the nonprofit said.

Most plastic is made from fossil fuels. Negotiators at the United Nations climate talks known as COP28 agreed in 2023 the world must transition away from planet-warming fossil fuels and triple the use of renewable energy.

As pressure to reduce fossil fuels increased globally, oil and gas companies looked more to the plastics side of their business as a market that could grow. Trump strongly supports and gets support from the oil and gas industry.