. >> i its going to change ththe nature of our culture, our cities, and how we go about our daily lives. >> in earth's history, there have been five mass extinction events. the last of which occurred 65 million years ago. >> there was a mass extinction from an enormous media or, asteroid thahahit the earth t tt cocost tremendous debris to go p into the atmosphere and cooled the planet for a long time. >> half of all species went extinct, including the dinosaurs. the rate of species loss today is on par with that event, and is by far and away the highest rate of species loss since humans have been around. their rate of species loss today is probably at least 100 times that which occurred before humans were around. for many groups of species, the rate is near to 1000. mass extinction is caused by one species -- man. >> we are on pace to lose 50% of species b by 2100, l largely duo habitat loss anand climate chan. >> the major danger is habitatt destruction. each s species has very speciail habitat requirements. once you destroy those, you destroy the species. >> we are cutting down our ra

of ththe city has dououbled in e last years in united statates ad itit leads to type 2 diabetes, n enormous public health problele it kills a a quarter of a millin people in this country every year and costs the economomy $90 billion. we havave no idea how polar beas prevent b becoming diabetic, evn thouough they a are massivelely. we to understand that. we have to sttudy them in the wild. they do nott hibernate in zoos r in laboratories. polar bears have secrets to teach us. if people understood those connections better, i think they would have a much greater value to biodiversity, to ecosystems and individual species. >> we both have to understand what science is telling us. we are losing this diversity of life. that loss is directly inflfluencing our ability to led healthier lives. >> if we expropriate the whole earth and try to take off, , we are the lords of creation -- wee are not. we are one of millions of animals. to ththink of itt as planet the oceanan. we have to livive within our means. living within ouour means applis to ecology just as much as it applies to budgets. >> it dodoe

of vessels coming in -- but if they further destroy the ability to bring humanitarian aid into ththe cityit will result in a full-blown famine. amy: and cholera? the issue of cholera. hundreds of yemenis have now died because of the devastation of the sanitation system. >> half of the medical facilities in yemen have been destroyed. again,n, the s significant -- mt of them by the saudi bombing campaign. you now have an outbreak of chololera that is declared a national catastrtrophe in yemenn where theyey're saying now one t of e every 10 minutes a yemeni s dying from the effects of cholera. amy: why do you thihink presidet trumump went to saudi arabia first? the first country in the world, his first foreign trip? most president since roronald reagan have visited either canada or mexico as their first foreign trip. >> well, first, think of all of the protests that would have broken out in canada and mexico with trump's appearance. you did not see one protester on the streets of saudi arabia because protesters would be arrested, flogged, beaten, tortured, and the apps -- perhaps beheaded. i

and learn to create ththe perfect pizza in the city where it was born. my pizza. man: perfecto.o. i'm a pro. my name is josh garcia. ever since i was a kid i dreamt about traveling the world by ocean, immersing myself in new cultures and exploring nature's wonders. now i'm making that dream a reality. my mission: to seek out the awesome people and

historyryto hide ththe trututh, whwhich is that ththe confederacy was on the wrwrong side of humanity. a aererected 166 years the founding g of our cities, 19 , theseafter the civivil war monuments that we took down were meant to rebrand the hisistory f ouour city y and the ideals of e confederacy.. these statues are not t just onn metal, notot just innocent remembrances of a benign history. these monuments celebrate a fictional senate has confederacy, ignoring the death and enslavement and terror that it actually stood foror. and after the civil war, these monuments were part of that terrorism, as much as burning a cross on him once on. they work erected us and a ststrong message to alall who wd in the shahadows of about whwhos still in charge in this city. amy: white natationalists have staged a series of protests and issued threats in the lead-up to the memorials' removals. a car belonging to one of the workers had also been set on fire. though the four most prominent confederate monuments have been removed, activists are calling for new orleans officials to remove all monuments, school names, and street signs in n new orleanans dedi

in ththe dry season, the light unprotected soil is swept up in the winds, causing the dust ststorms ththat are blown over china''s cities and beyond its bordeders. on the plateau, the researchers realized that progressive degradation of the environment trapped the local population into a life oof subsistence farming. it's a prprocess ththat has o od tthroughout ththe world where poor agricultural communities find themselves overusing their land in order to survive, depleting its fertility and further imimpoverishing ththemselves. one thing that became apparent early on is the connection between damaged environonments and hum p poverty. in many pararts of the world, tthere's been a vicicious cycle. continuous use of the land has leded to subsistence agrriculture.. and generation byby generation, this has further degraded ththe soils. the vital question we have to ask is, can this destctive prococs be reversed? [indiststinct announcncements] 15 years ago, chinese and internanational experts were confidenent it could be. they decided that to prevent further erosion, it was necessary to cease farming on certain key areas to

in 2005, the city of london introduced a violent extremism. 4 suicide bombers blew themselves up they hit the public transport system. 52 people killed and hundreds injured and ththe deadliest attk on british soil. two weeks later, another attack narrowly avoided when poorly made explosives never went off. hack aw 2 extremists soldier to death. video footage of one of the murderers wielding a machete was seen around the world. two months ago, a red light bridge citizen -- a radicalized british citizen ran his car into pedestrians and killed an officer. islamic state claimed responsibility. in march, the most senior terrorist officers said several attacks had been thwarted. us.or: stephen carroll with , not even 24hester hours after the horrific attack after the manchester arena. tell us more about the vigil planned later today. it was announced by the mayor, andy berman, and is asking for people to gather at 6:00 at hours gather -- our square and he said is important that they send a message that you though they are grieving they are strong and together. he is asking people to attend to he isolidarity and praising those people who volunteered their rooms, taxi dri

city to give them tour of philadelphia. the ceo of iceland air said philadelphia will strengthen ththe airlines presence, and better serviceassengers with faster travel times, to europe, and easy connections through philadelphia, and we have learned, mike anal he can, that a new flight has been arrange from the boston. it will take off today, at 4:30 p.m. >> where is it going to lands? >> in iceland. >> always wanted to go to iceland. >> me too. >> i'm so excited. i would like to piece that cake. made the front page of both the fold and the iny. >> it looks like sweet tee, but i bet not. probably philadelphia bakery. >> a lot of people going to iceland. >> a lot of people g just not our mayor. just kidding. >> the northern lines. >> only to us would this happen. >> i know. >> hopefully up and running today, 6:08. we do have some developing news out of afghanistan. massive explosion has rocked a diplomatic area of the capitol of kobul. it happened at the peak of rush hour. say it is a suicide car bombing, afghan officials say 80 people have been killed. and as many as 400 other wounded. the german embassy the foreign minist