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five people killed when an air ambulance crashed in heeno. what we have learned about the passengers and the investigation as the company temporarily grounds its fleet. brutal fighting as ukraine battles russian forces in the east. entire towns evacuated as russian tanks open fire on residential buildings. vladimir putin labels it an existential struggle. and reports of another american killed in the fighting. plus, the warning to china. one of president biden s top advisers saying china will pay real costs if it sends military aid to russia. dozens of migrants drowning off the italian coast when their boat crashed into rocks. more than 150 people crammed into the rickety ship on that dangerous journey. rough weather slowing down the search for victims. the student loan showdown, the supreme court to decide if president biden has the power to forgive student debt for tens of millions of borrowers. the strong opinions on both sides. a standing ovation for wnba ....
Naacp image awards. her message of support for americans detained overseas. and america strong tonight, tonight, the new college champions breaking barriers and making history in the swimming pool. announcer: from abc news world headquarters in new york, this is world news tonight. good evening. great to have you with us on this sunday. i m whit johnson. we begin with that breaking weather news. as we come on the air, millions are on alert as a life-threatening wind event takes aim at the nation s midsection. it comes from the powerful system that slammed california, now racing to the northeast. strong winds blasting through texas earlier today. dust blowing across the roads, creating hazardous driving conditions. more than 5 million americans in and around oklahoma under threat right now. residents are being told to stay alert for possible tornadoes, winds could reach 110 miles per hour. that system then moves across the rest of the country, ....
Ein Leben in Sicherheit 2. Juli 2021 Biofilm als sicheres Zuhause Das Leben in Biofilmen hat dabei eine lange Geschichte: Paläontologen haben in Westaustralien versteinerte rund 3,5 Milliarden alte Biofilme in Stromatolithen nachgewiesen. Diese manchmal fast turmartigen Gebilde entstehen, wenn sich Mikrobenmatten mit ablagerten Sediment abwechseln. Noch heute bilden Bakterien solche Stromatolithen. Dass sich die Lebensform so gut bewährt, hat auch einen Grund. Biofilme bieten Mikroben vor allem einen entscheidenden Vorteil: In der fest mit einer Oberfläche verbundenen Schleimschicht sind sie gegen Störungen von außen gut geschützt. Bilden Bakterien beispielsweise auf Kies an einem Gewässer einen Biofilm, werden sie dort regelmäßig von Wasser überschwemmt und können sich von den darin enthaltenen Nährstoffen ernähren. Sie werden jedoch nur selten aus ihrem Biotop herausgewaschen und etwa in den nächsten Fluss gespült. Die Stabilität des Biofilms mach ....
Tigris river we found a huge amount because this war affected by war activities multiple war activities so drained farms and abundant farms became a huge source of dust in fact from this region. the city of us in who is a stand southwestern iran is now one of the most polluted cities on the planet partly because of dust blowing in from iraq. the marshlands in southern iraq a grossly affecting all our western southwestern cities like that was. part of it is also coming from neighboring countries and are coming from the hot spots that we have inside the country in the areas which are prolonging to soil erosion. was. only two sectors twenty fourteen ten was hit by ....
Atmospheric dust has always being with us and there are some benefits. this is a very positive impacts from dust storms blowing around the planet many of the soils in the caribbean islands the clays came from north africa and it enabled the pre-columbian indians to build plate clay pottery and without that dust blowing across and building up in the soils the clay wouldn t be in the caribbean you wouldn t find. dust also contains valuable nutrients for plants. so when the rain forests from north africa the dust flows over it goes into south america during the north northern hemisphere is winter and moves down and there. and many of the plants derive their nutrients and are fertilized from the last in the end the same with asian dust blowing across fertilizers some of the northern hawaiian island rain forests and sustains them so there s some very positive things ....