Coastal cleanup volunteers last year collected about 7 million pounds of debris from the world's shorelines, including 1.9 million pounds of cigarette butts, the Associated Press reported June 7.

The report from the Ocean Conservancy on a one-day international cleanup project last September found that, for the sixth straight year, cigarette butts constituted the most common type of trash collected. Food wrappers and containers came in second.

About 6.5 million volunteers have taken part in the annual cleanup since 1986, collecting 116 million pounds of trash. In the U.S., 182,100 people took part, the largest contingent of volunteers worldwide.