Why allergies are worse this year, explained

You are not imagining it: Allergies really are getting worse.

A series of recent studies have found that more people are suffering from pollen-related allergies and people who do have these allergies are suffering longer than they used to. The causes are wide-ranging but the main one is climate change.

University of Utah professor William Anderegg was the lead author of one of the studies. He spoke to Here & Now's Scott Tong about the allergy boom.