I want to turn to something different. A lot of people are anxious about climate change and particularly young people have a very what I would call a doomsday attitude toward it that the world will end soon. The climate change this isn't for those listening has never heard this is not a fringe idea among a small group of cultists. It's a very mainstream idea among young people in many countries. You describe yourself as an environmentalist you should be sympathetic to this doomsday scenario and concern and yet you argue that it is not the best approach. How do you tell me how tell me your thoughts on that.