Many American harbors are polluted with invasive organisms, often transported in the ballast water of ships. The problem is particularly bad in California. But, scientists there are developing aggressive ways to combat invasive species. Nathan Johnson reports.
Every day, reporters and producers at The World are hard at work bringing you human-centered news from across the globe. But we can’t do it without you. We need your support to ensure we can continue this work for another year.
Make a gift today, and you’ll help us unlock a matching gift of $67,000!