NEW YORK (AP) — Around climate-change protests, tears linger. Youthful activists cite all-too depressing science and develop angst. They grieve for a future they worry they'll never have.

Many young climate activists say they feel hopeless and overwhelmed. Psychologists say it's good they're talking about it. It's sometimes called "climate change anxiety," and you don't have to be an activist — or young — to feel it.

"It's really hard to grow up on a planet full of ifs," said This is Zero Hour co-founder Jamie Margolin, a 17-year-old from Seattle, who is finding hard to buckle down and apply t...