Amazon, Walmart and the world's biggest retailers are making port congestion and pollution worse, new report finds

The supply chain is facing major blockages, and container ships are heaping pollution into communities near the congested ports.

The biggest offenders are, unsurprisingly, the world's biggest retailers, according to a new report Tuesday conducted by environmental organizations Stand.earth and Pacific Environment. The report shows that goods imported to the United States by Walmart, Target, Amazon and IKEA between 2018 and 2020 accounted for 20 million metric tons of carbon dioxide equivalent emissions.

As of Monday, there were 84 vessels waiting off the coast of Southern California, 37 outside the Port of Los Angeles and the other 47 near the Port of Long Beach.