Hundreds of thousands of motorbike taxi drivers in Rwanda will be able to change petrol motorbikes into electric cars Bloomberg reported that the Rwandan government has partnered with a local company, Rwandan Electric Mobility, to deploy electric scooters in the country’s capital, Kigali. Rwanda has a population of more than 12.6 million people living in an area of ​​26,338 square kilometers, and is the most densely populated country in Africa. The motorbike taxi industry, motorbike taxi service, or delivery is a popular method of transportation and delivery in this country, thanks to its affordable prices and access to all corners of the country. Therefore, the initiative to convert gasoline-powered motorbikes that are nearing the end of their service life to electric ones, will help about 100,000 current motorbike owners to have new and zero-emission vehicles. This move not only reduces the overall carbon footprint but also effectively extends the life of these vehicles. It also greatly reduces maintenance costs, car owners don’t need to worry about oil changes and refueling their vehicles. To launch the project, the Rwanda Environmental Management Agency (REMA) signed a contract with Rwandan Electric Mobility, and technical and financial support from the United Nations Development Program (UNDP) was also secured to promote the project. project progress. The trial phase, which is expected to last for 6 months, will convert about 30,000 motorbike taxis currently using gasoline engines to electric motorbikes.

The study suggests that the “hot spots” will be places where horseshoe bats live and have factors that make the risk of corona virus spread to humans and outbreaks into epidemics. This study does not provide additional information about the SARS-CoV-2 virus, but rather points to locations where similar corona viruses may appear in humans in the future. The study results show that southern China is a very high-risk place, and urges us to reduce risk factors, such as reducing deforestation, not just deal with the virus when it has become an epidemic. . Perfect combination” Research by the Intergovernmental Policy-Science Platform on Biodiversity and Ecosystem Services (IPBES), a German NGO, shows the number of outbreaks caused by zoonotic diseases object is on the rise. Accordingly, it is humans who are the cause of this increase, through deforestation and destruction of natural ecosystems. At least a third of disease outbreaks since 1960, including Ebola, have been linked to changes in human land use, the report said. Deforestation is one of the many causes of the increasing number of zoonotic diseases being transmitted to humans. Photo: Greenpeace. As humans encroach on natural forest land, the risk of humans coming into contact with wild animals, as well as the pathogens they carry, increases. Newly published research reinforces this hypothesis, as it shows that the risk of humans coming into contact with wildlife increases if the area of ​​primary forest is reduced by 25%. In addition, the destruction of natural habitats also causes disease-carrying species, such as bats and rodents, to become more numerous. Scientists also warn that the occupation of forest land is just one of many causes of zoonotic diseases spreading to humans. High population density, as well as large-scale livestock production, are two other factors that increase the risk. That’s because pets can catch diseases from wild animals or become vectors of disease to humans. The risks to industrial farms are even greater, where large numbers of livestock live in small spaces, and these animals are often less resistant. Outbreak “hot spots” Paolo D’Odorico, a professor at the University of California, Berkeley and co-author of the study, said that most research on corona viruses currently focuses on human-to-human transmission, not on the possibility of elimination. This virus is transferred from animals to humans. Therefore, he and his colleagues collected data on forest land occupation, livestock density, population density and a number of other factors and compared it with the habitat of horseshoe bats in Asia and Africa. Europe. Horseshoe bats are considered to be carriers of a large number of corona viruses, including a species closely related to the SARS-CoV-2 virus. The “hot spots” of potential coronavirus outbreaks are shown in dark red. Photo: Natural Food. The results of the study are represented by a map, in which dark red dots represent areas with a high risk of corona virus spreading to people. In contrast, the blue dots indicate places where there are relatively few conditions for disease outbreaks. Professor David Hayma, another co-author of the study, said that the main concern is that large areas of southern China are still at high risk for a new disease from the corona virus to emerge. In addition, the scientists also pointed out that some areas, including Shanghai, Japan and the Philippines, are at risk of becoming “hot spots” if deforestation continues. “We need surveillance in these areas to prevent the emergence of new diseases,” Hayman said. How to prevent a new outbreak? Scientists estimate that as many as 1.7 million virus species have not been detected in mammals and birds, and half of them have the potential to spread to humans. Professor Andrew Dobson of Princeton University, thinks that the Covid-19 epidemic is a wake-up call for us. “The most important thing is to figure out what we can do to reduce the likelihood of similar events happening,” said Dobson, arguing that we should start from stopping deforestation. Horseshoe bats are considered to carry many pathogens and are capable of spreading to humans. Photo: Wall Street Journal. Professor Dobson said that people living in “hot spots”, such as in southern China, should “put pressure on politicians” to introduce appropriate policies and mechanisms to protect forests. The cost of protecting forests will be much lower than the price we pay each time a pandemic breaks out, IPBES research shows. Besides, experts also warn that the livestock industry should take appropriate measures to prevent livestock from being infected. At the same time, they also call for a greater focus on the earth’s ecosystems. “We knew how to launch rockets into space decades ago. But understanding how diseases spread from animals to humans is a much more difficult problem,” Professor Dobson commented.

Located in a densely populated area in Singapore, the house has a public walkway right next to it. Behind is a high-rise building under construction. Therefore, privacy issues become a major concern of homeowners. Accordingly, the architect prioritizes discreet walls on the outside of the facade. Plain brick walls in neutral tones help to reduce the rough, heavy feel of an introverted building. The window ensures ventilation for the space but has a compact design and is glued with one-way anti-seeing glass paper. The land is divided into two parts corresponding to the building and connected by a green garden in the middle. Garden design allows the house to have the necessary breathing space to limit the situation of long and narrow pipes. Contrary to the somewhat discreet facade, the space inside the house is towards open architecture and prioritizes connection. In addition to the garden space between the two buildings, the house has an additional opening that is a skylight to help get natural light. Homeowners feel full natural sunlight right in the house. The living room and kitchen are located in the front block. The living room and kitchen are located in the front block. Wooden furniture gives a cozy feeling. Image source: Derek Swalwell Video: House of 25m2- opportunity to have a house for many people? Source: VTV24

Billions of T. rex have been wandering North America, a group of experts say. Although not a simple task, paleontologists from the University of California (USA) gave the T. rex dinosaur numbers in the Cretaceous period 65 – 98 million years ago. Challenging work Fossils have long been used to improve our understanding of extinct creatures like dinosaurs, but experts suggest that these skeletons are used to calculate densities and levels. Their abundance is a challenge. Director Charles Marshall of the University of California’s Museum of Paleontology is part of the research team. “There is no information available to make an estimate,” he said. If you find an Easter egg in your garden, how do you estimate how many Easter eggs ever existed? It simply cannot be done. You need information from somewhere else, for example, the density of the Easter eggs, how many years they can be found and how many Easter eggs have been placed in the garden. Paleontologist Nizar Ibrahim at the University of Portsmouth (UK) is not involved in the study. “Previously researchers tried to estimate things like the size of the Tyrannosaurus’ habitable area and their basic energy needs, so this is an extension of the work,” he said. before that, including many updates about Tyrannosaurus ”. There are 20,000 T.rex dinosaurs in North America T.rex is predicted to have a lifespan of 28 years. Using fossil records, densities and data from climate models, the University of California team calculated that about 20,000 adult T. rex, living across North America, could exist at the same time. . In a study published in the Journal of Science, researchers say this means that about 2.5 billion T. rex have lived and died over a period of nearly 2.5 million years – a process The dinosaurs live. For the first time, the team also calculated the lifespan of dinosaurs. Using scientific literature and expert opinion, they estimated T.rex’s adult age to be 15.5 years and its lifespan could reach around 28 years. The average adult body weight of this dinosaur is about 5,200 kg and a growth after maturity can make them weigh up to 7,000 kg. From the above estimates, the team concluded that each generation of T.rex lasted for about 19 years and there was a dinosaur for every 100 square kilometers. They determined that, with 20,000 permanent dinosaurs and about 127,000 generations of this species, there would be about 2.5 billion T.rex overall. “The researchers’ approach seems informative, while also pointing to current limits on what can be done,” said Jason C.Poole of the Bighorn Institute of Paleontology (USA). learned from the known “. “I’m sure it opens the door to better focus on questions about population density and what it means over time. So this can really help us understand how animals change over time as it is related to evolution and changing ecosystems, ”said Mr. Poole. The researchers estimated that the population density of T. rex was equivalent to 3,800 carnivorous dinosaurs in an area the size of California, but only 2 in an area the size of Washington DC. . Open up the possibility to find out more information A T.rex dinosaur could have an average weight of 5.2 tons. Meanwhile, the results also allow the authors to determine that only about 1 in 80 million T. rex is preserved as fossil remains. “The big impact of this study may be how rare the fossils are, they represent only a fraction of the individual organisms that ever existed, not to mention the depth of time and the rate. it happened in a few thousand to a million years, ”Mr. Poole said. Study co-author Professor Marshall of the University of California said, “In a way, this is a paleontological exercise of what we can know and how we can know what. there… It’s amazing what we know about this dinosaur so we can calculate more information.Our understanding of T. rex has expanded greatly over the decades. Through more fossils, more analytical methods and better ways of integrating information through known fossils ”. Mr Ibrahim sees other possibilities stemming from this study. There is a lot we don’t know about T.rex’s physiology, behavior, and food environment, he said, but this study offers an interesting approach to estimating abundance and prevalence. conservation of dinosaurs. “I would love to see it apply to the other dinosaurs we know from fossils. Looking at a wide range of dinosaurs, predators and prey, we can better compare dinosaur animal communities to modern ones, ”he said. What we see is superficial, according to Ibrahim, and even with this fascinating research, there is still a long way to go for us to confidently apply these approaches widely in research. save dinosaurs.

Staff installing a 5G base station in Korea. Photo: Koreabizwire According to the ministry above, carriers include SK Telecom Co., KT Corp. and LG Uplus Corp. signed an agreement so that 5G users could access the high-speed network of any other service provider they registered in 131 remote locations across South Korea. Accordingly, 5G users will be able to use another carrier’s network in places where their service provider does not have coverage. The Ministry of Science and ICT said telecom carriers will test network sharing systems before the end of the year and aim to fully phased in by 2024. Remote areas selected to provide 5G network sharing are sparsely populated, with a population density of 92 people / km2, while areas that do not share 5G networks have a population density of 3,490. person / km2. The move to share 5G networks comes as South Korea is racing to establish 5G coverage nationwide, with network equipment currently installed in major cities. In July 2020, the three major South Korean carriers pledged to invest up to 25,700 billion won (23.02 billion USD) to upgrade the network infrastructure by 2020. As of February 2021, South Korea has 13.66 million 5G subscribers, accounting for about 19% of the country’s total mobile network subscribers. South Korea was the first country in the world to commercialize 5G networks in April 2019.