that is what scientists at the university of applied sciences in being are trying to find out in the institute's rooftop garden. they're using a special gas measurement device to gauge how different plants alter air quality. once the bell jar closes over the poppy plant the researchers can evaluate its potential. and here is what they discovered. the c.b.d. so cycles i can see there is a reduction in carbon dioxide concentration so underneath the glass dome the plant starts to photosynthesize very actively and c o 2 absorption is much higher than c o 2 emissions from the ground. in other words the party is compensating for emissions from the ground that means that the complex plant and substrate is protective rather than harmful to the environment. poppies would seem to be a promising option. the scientists and bring in are also investigating efficient irrigation systems even abundant greenery will die if it doesn't get enough water. out here for our projects are designed to show how little effort is required to ensure that a roof garden flourishes in the long term not the idea is fo

withdrew from the treaty and apply sanctions since then iran has been scaling back its compliance with the accord professor of political science from the university of tehran 100 believes you didn't want to maintain the deal in the 1st place. the europeans wanted to keep the deal in place but they were unable to stand you know american pressure their companies weren't able to really invest in iran because of the us hegemony in the global economic order perhaps the europeans didn't want to do in place from the beginning rather the europeans were playing in a good cop bad cop strategy against iran in which the americans were the bad cop and the europeans were the good cop when the u.s. decided to leave the nuclear deal it was the europeans that convinced you want to stay in the euro and they promised that you know they would shielding on from the sanctions and as a result of that iran actually stayed in the deal for a 4 year without backing away from any of its of the geishas because of those european promises in reality none of those promises materialized so i think there is actual the actual possibility that the europeans were insincere in any of

of environmental sciences. >> to get into a research group here at the university of illinois, you obviously have to have promise. her intent was to begin a ph.d program here in the fall. >> yingying was applyingn in our lab. she was really excited about almost everything. it's just, it's a new, kind of a new world and a new life open to her. >> she was so new. she had only been here for a few weeks. and so she hadn't really had a chance to establish a lot of relationships. >> she spent lots of her time working, or doing research. she also bought a guitar. and she said she didn't have a lot of time to play it. but it just made her feel like she had a friend in her apartment. >> friday, june 9th, 2017. just a typical beautiful summer day here. >> during the summer, campus is a lot more empty while the students are home. >> yingying went to turner hall on campus that morning of june 9th. >> it's just a normal day. we kind of cleaned some equipment we have been using. >> so around noontime, she told me she had an appointment around 1:30 p.m. to sign an apartment, the lease. >> so she was living on the south end of the campus. what they call the married student housing complex. >> she was looking