. >> marita davison is an environmental biologist. tonight, a trip to the heartland. >> oh, there's a baby! >> cara santa maria is a neuroscientist. i'm phill torrez. i'm an entomologist. >> the epic drought of 2015 takes a hidden toll. from above these trees may look green and healthy, they are not. >> here we see somthing that's dramatically different. >> now the technology that can see what we can't. >> that's our team... >> i'm a prarie barber. >> ... now let's do some science. hey guys welcome to techknow. i'm phil torres joined by cara santa maria and marita davison. and today we are going to talk two environmental stories and to start off the great american prairie. to me it's one of those iconic images of what the u.s. used to be. unfortunately, now it's almost entirely just a part of our history. >> yeah, there's been a lot of over development of farming, and the suburban explosion that's really taken a toll on a lot of prairie ecosystems. illinois has been extremely hard hit. it's changing but there's been a big change in th

techknow's marita davison has spent a week here in new orleans - now marita, you've been piecing together what went wrong from a science and engineering perspective. >> and phil you said it, this community was devastated when hurricane katrina hit, now in the 10 years since, scientists have made significant improvements to the system, these are coming together to form multiple lines of defense that reduce the risks from another katrina-like storm. let's take a look. >> this area has been vulnerable to storms like katrina since 1200 years ago. >> katrina was really a wake up call to the corp of engineers. >> what katrina did is... it brought the eye to what's happening when you destroy things...if we don't repair things that protect us, in 80 years the city of new orleans will be under water. >> a decade later, hurricane katrina is still considered one of this country's most deadly storms. in august 2005, katrina claimed more than eighteen hundred lives along the gulf coast--leaving 80 percent of new orleans under water. when katrina hit new orleans she was only a category 3 storm. but in

crystal dilworth and marita davison. fraking.s don -- fracking.doesn't come without controversy, potentially doesn't come without cost. >> yes, fracking is hugely controversial. humannics. >> s that range the gamut from environmental to health. and texas has been kind of at the center point of a lot of this issue. whether they're economic, environmental, political, texas is in the mix. >> when we think of texas we think big oil, not earthquakes like we're thinking of california. but they're experiencing seismic activity. >> so we got to see how one small town in texas is dealing with this big national issue. let's check it out. >> we were sitting in the living room one night watching tv and there was a tremendous explosion, it sounded like, and then the whole house shook. >> and the next day there was another one and then just kept coming. and that's whenever we realized we definitely have a problem. we should not be having earthquakes in texas. country. this is reno, texas. population 3200 and just 13 square miles long. if anypl

. >> marita davidson is an environmental biologist >> i am holding a tray of elephant poop. >> she'll show us the high tech plan to stop the killing. >> wow >> then, sea lion's stranded along the california freeway. yes, freeway... >> dr shini somara is a mechanical e engineer, she'll show us what's been done to to find out why this is happening. >> at this stage, are they feeling distressed? and i'm phil torez, i'm an entomologist. that's our team, now lets do some science. >> welcome to techknow im phil torres joined by marita davison and dr. shini somara. guys there are outlaws out there working in the shadows committing horrible acts against defenseless yet majestic animals. we're talking about the ivory poachers who have decimated the populations in africa. >> it's really alarming because ivory goes for about a thousand dollars a pound, that's more valuable than illegal drugs. >> and you know what that means is that the damage has been devestating over a hundred thousand elephants have been killed in just the last three years and the question is what can we do about it? we found

hey guys welcome to techknow we're here with cara santa maria and marita davison, because we're talking about drilling for oil in the arctic. now i got to spend twelve days aboard an arctic ice breaker - the us coast guard cutter healy. let me just say, it was complicated. >> and phil, both weather and climate change are huge parts of the story because the sea ice in the arctic is receding. >> and i actually got to see that sea ice receding in action, and the scientists up there that were monitoring this are overwhelmed by the speed that this is actually happening. >> well it seems that the more the ice recedes, the easier it would be to drill right? >> yeah but what happens is actually different because even though the sea ice is gone, the extreme weather conditions remain and that's causing big problems for big oil. >> the arctic - remote, breath-taking - and one of the world's harshest frontiers. for years it's been a front line in a battle over the future of energy and climate change. temperatures here are rising twice as fast as the rest of the world. but the arctic may hold 13 per

residentes de la bahiatake vo han venido disfrutandoanlmente, y que csiste en exhibiciones aereas y maritasnderestuvo en el primer dia de este eventtake 2 box ---y andres como esta elambien? adelante tescuchamos con la informacion... take pk 0.01 0.05 0.28 cesar ---una parte de laautopista 84 al este de la bahia permanecio cerrada al trafico vehicular gran parte del a..take map ---la zona que permanecio cerrada hasta las 4 de esta tarde esta comprendida entre laautopista 84 y las calles "old canyon road" efremont y "main street" ensunol... take vo ---el lugafue ilizado por peanes, ciclistas, y hasta jineteqdisfrutaron de buen tiempo quprevalecio... ---este es un proyecto que podria hacerse realidad a uncosto de entre7 a 69 millon de dolares. take vo cesar ---el presidentebarackbama vuelve a rivir el tema de lamigracion indocumentada en unreunion con congresistas federales... take vo blanca ---ademas, enterese cual la mejor epoca del aÑo para que la inyeccion contra lgripe tenga el jor efecto. lucrecia lot live weather cam blanca ---inmigracin... ese fue el tema central l presinte anoche enu

marita davison is a biologist specializing in evolution.onight, fracking. >> i looked out my front door