1. The problem asks: Where does 60% of plastic end up? 2. This is a question about environmental science, specifically plastic waste management. 3. According to studies and reports, a significant portion of plastic waste ends up in landfills. 4. The 60% figure typically refers to the amount of plastic waste that is disposed of in landfills rather than recycled or incinerated. 5. Other destinations like oceans, backyards, and rivers receive plastic waste but not as much as landfills in terms of percentage. 6. Therefore, the correct answer is that 60% of plastic ends up in landfills.