These chemical problems have caused a wide range of problems, including “cancer-causing mutations.” The decomposition of plastic in the ocean causes the release of toxic chemicals. The United Nations Environment Program (UNEP) report estimates that around 130,000 dolphins, whales and porpoises are caught in nets every year. David W. Laist reports that “more than 260 species are said to have become entangled in or ingested marine debris.” Ingestion of plastic occurs largely because marine animals mistake it for food; the results can be fatal. Marine animals also become entangled in various types of plastic, which often causes growth problems or death if they fail to surface when