Science, Tech & Environment

No Joke: Sea blobs on the rise

Scientists say global climate change is responsible for the spread of massive blobs of floating marine mucus. The blobs are concentrated along Italy's coast but have been spotted in more than 20 oceans around the world. The blobs are harmful to humans and sea life. And they're taking a toll on Italy's multi-billion euro tourism economy. The World's Marina Giovannelli reports.

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