ulas bayraktar is determined to remain positive. he came all the way from mersin to be here in istanbul today. ulas: it's not easy. it's not easy to insist on optimism. sometimes you need to be -- you need to see that you're not the only maniac. you're not the only fool of the town. there are other fools, if this is stupidness. so, you just start to re-believe in yourself. you just refresh your insistence and your struggle. reporter: ulas bayraktar is going to need his strength and positivity. all of the academics who signed the peace petition have been legally charged. the first court proceedings began in december. but the prprofessor says he's t afraid -- after all, he's an eternal optimist. host: this week in our global ideas series, we take a look at a billion-dollar industry -- cut flowowers. most of f the world's supply cos fromararge-scale flower farms in just a handful of countries. it's a business worth around 44 billion euros a year. the global center of the cut flower trade is still the netherlands. but production is on t