Single-use plastics, such as straws, bags, and packaging, persist in the environment for hundreds of years. By 2050, it is estimated that there will be more plastic in the ocean than fish by weight. When plastics degrade, they break into microplastics, which enter food chains and threaten wildlife and human health. For example, a study by the University of California found that 94% of tap water samples in the U.S. contain microplastics. The production of these plastics also contributes to greenhouse gas emissions, exacerbating climate change.