Pia Lee-Brago – The Philippine Star February 7, 2022 | 12:00am MANILA, Philippines — Cigarette butts account for more than 766 million kilograms of toxic trash each year and are the most common plastic litter on beaches, according to the United Nations Environment Program (UNEP). Globally, more than six trillion cigarettes are produced annually, each containing filters or butts that are mainly composed of microplastics known as cellulose acetate fibers, UNEP said. “Cigarette butts that are not properly disposed of get broken down by factors such as sunlight and moisture, thus releasing micropl…