>> the world is going to end in 12 years if we don't address climate change. this is our world war ii. don. dan: doctor, one of my favorite books, the world's search for meaning. he says the key to mental health is having hope. are we stealing away hope for these kids with this constant alarmism all the time? >> children are like violins. and they play the stress of their parents. so with the societal unrest and political divide, there are a lot of very you be happy children. if you mix that with their incredibly awful diets we feed kid today, just think of a happy meal, and the social media addictions they have, you see why anxiety, depression, suicide