A recent review of over 3,000 studies suggests that tiny pieces of plastic shed from tires, garbage, and other sources may be causing respiratory problems and other illnesses. The particles, which are smaller than a grain of rice, have been linked to male and female infertility, colon cancer, poor lung function, and chronic pulmonary inflammation.
According to Dr. Tracey J. Woodruff, a professor at UCSF, microplastics are essentially particulate matter air pollution and are known to be harmful. The study’s findings, published in Environmental Science & Technology, expand on previous research by the California State Policy Evidence Consortium (CalSPEC).
Microplastics are ubiquitous in the environment, with companies producing nearly 460 million metric tons of plastic each year. Common sources of microplastics include:
– Plastic pellets
– Personal care products
– Paint
– Synthetic textiles
– Tires
The paper is the first systematic review of microplastics using gold standard methods approved by the National Academy of Sciences. While most studies were based on animals, the researchers believe that human exposures are likely similar.
Experts warn that regulatory agencies and policymakers must consider the growing evidence of health harms from microplastics, including colon and lung cancer. The study’s authors hope that state leaders will take immediate action to prevent further exposures.
Source: https://www.ucsf.edu/news/2024/12/429161/microplastics-air-may-be-leading-lung-and-colon-cancers