Cigarette butts are the most common items polluting Jeju beaches, according to a non-profit environmental group that is staging a coastal cleanup campaign.
According to the Korea Federation for Environmental Movement of Jeju, cigarette butts account for 22.9 percent of the total, followed by plastic debris with 22.5 percent.
Other disposable trash commonly found on Jeju beach are straws, tableware, and beverage bottles.
Cigarette butts are very harmful to the marine ecosystem due to the cellulose acetate found in their filters.
Cellulose acetate is a plastic-like material that does not decompose easily.
A single cigarette filter contains thousands of those tiny microplastic particles.
Hundreds of volunteers have taken part in the association's campaign since May 29 and have collected about 500 kilograms of trash.


Iran Allows Oil Tankers Through Strait of Hormuz Amid U.S. Negotiations
How the war in Iran is already affecting UK farmers and food production
Asian Stocks Rebound as Trump Delays Iran Strike Deadline
How ongoing deforestation is rooted in colonialism and its management practices
Google's TurboQuant Sends South Korean Chip Stocks Tumbling Amid AI Memory Demand Fears
Gold Prices Drop Amid Iran Peace Talk Uncertainty and Stronger Dollar
How America courted increasingly destructive wildfires − and what that means for protecting homes today
Oil Prices Climb as Iran Reviews U.S. Peace Proposal Amid Middle East Tensions
How is Antarctica melting, exactly? Crucial details are beginning to come into focus
ECB Eyes Rate Hike Amid Iran Conflict-Driven Energy Price Surge
Swimming in the sweet spot: how marine animals save energy on long journeys
We combed through old botanical surveys to track how plants on Australia’s islands are changing
Drug pollution in water is making salmon take more risks – new research 



