and a boston exhibit celebrating the works of alexander calder. next on pbs newshour weekend. >> pbs newshour weekend is made possible by: corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are your retirement company. additional support is provided by: and by the corporation for public broadcasting and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios in lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening. thanks for joining us. the united nations warned today that the world must get most of its energy from renewable sources by 2050 or increase the likelihood of what it called severe, pervasive and irreversible damage. a report produced by hundreds of scientists around the world said inaction ultimately would prove much more expensive than switching over to renewables. secretary of state john kerry issued this statement in response: greenhouse gas emissions from human activity are higher than ever

the second kind of surrealist artist the painter poet is exemplified by the sculptor alexander calder and the painters joan miro and max ernst. using poetic techniques of free association, they explored ways of reducing the conscious control of the rational mind. miro's paintings from the twenties, like siesta seem to have no structure just a loose free flow of images which seem to come out of the blue. max ernst-- using a technique of rubbing natural objects such as wood, shells and leaves-- managed to bring forth unforeseen images, creating landscapes that are truly surreal. this painting of 1927 is called forest. ironically it was in those societies which claimed the most far-reaching utopian ideals that the fiercest backlash against modern art and abstraction took place. stalin in russia hitler in germany, reviled modern art as degenerate, decadent, and elitist, and they sought to replace it forcibly by an art portraying the proletarian glories of their new order-- a kind of heroic social realism in which, ultimately the political meaning was absolutely unambiguous and totally con

" magazine whenever i rebook fargo two's 10 or 20 friends to say correct but now in one day as of calder no different tribes and got 17,800 corrections which is really cool. [laughter] a lot of them are in there. i will float the idea. this should not just be a book handed down. we will work together to turn this into a multimedia book i dunno if we're ready to announce that yet but we just did the next thing i want to do i wanted to be somewhat like with the pds document and also multimedia. so charlie calling can take his loss and a plug to become part of the book and then to say let me put it up i have pictures of that video may be thousands of people could do a collaborative book. as an author but it should be as a curator of a crab source with a multimedia block that the next phase is when bit chlorine or other ec currency grid is collaborative a created so the content should not always be free if they pay $10 that can be allocated on those that contributed so with the crowd sourced carey did royalty share multi media forms of narrative history. that is amazing. we will do well here

helicopter reporter alex calder is covering the awards for knbc news when he hears about a police chaseby city of englewood. >> it sounded very, very exciting, and i called the station and said, there's a pursuit and we are literally five minutes away from it. we can get there very quickly and they said, go! >> at 11:00 p.m., alex goes live. >> the driver of the car appears to be a young male. oh, look at this, what -- wow! he spun out, almost hit that car in the intersection. looks like he just missed him. this kid kept driving in circles and after a while we kept hearing the same street names called over and over again. we have seen him on this stretch several times here, so this is kind of part of his circuit here. he was blowing through all the red lights, he was driving very fast. he goes through a red light. now he's at the wrong lanes of traffic once again. there's a lot of danger there. makes for very good visuals, but it is terribly scary for the people on the ground. >> one of those on the ground is the vacationing jason lee staying at a hotel in englewood. >> it was pretty ex