The “Opinions” also require that the construction of county towns should be integrated into nature, conform to the original topography, do not dig mountains, do not fill rivers and lakes, do not destroy the original landscape environment, and maintain the landscape and natural features. To protect and restore the buffer zone of rivers and lakes and the natural curvature of the river, it is not allowed to develop and construct houses in the name of wind and rain covered bridges.
In terms of creating a humanized public environment, the “Opinions” stated that the scale of county squares should be strictly controlled, and the construction of public spaces in administrative centers, commercial areas, cultural facilities, and residential areas that are convenient for residents to use nearby; promote a “narrow road, dense road network” “Small blocks” to create a pleasant spatial scale for the county; to control the width of roads in the county, the width of the red line within the county should not exceed 40 meters.
Source: CCTV News

Climate change is one of the main causes of extinctions worldwide. 5 mass extinctions Dinosaurs became extinct in the Jurassic, more than 200 million years ago. * Ordovician-Silurian Extinction: About 440 million years ago The first mass extinction on Earth occurred at a time when organisms such as corals and shellfish filled the world’s shallow waters but had yet to venture to land. Life itself has begun to spread and diversify, first appearing around 3.7 billion years ago. But about 440 million years ago, a climate change caused sea temperatures to shift, and much of the life in the ocean died out. At the end of the Ordovician, mass glaciations covered the southern supercontinent, Gondwana. According to a study published in the journal Oceanology, glaciation on this scale has stripped away high proportions of the world’s water and dramatically lowered global sea levels, depriving the world of vital habitats. species, destroying the food chain and reducing fertility, according to a study published in the journal Oceanology. However, not all scientists agree with this. According to National Geographic, other theories suggest that the toxic metal may have dissolved into seawater during periods of oxygen depletion, wiping out marine life. Other scientists suggest that a gamma-ray burst from a supernova ripped through a giant hole in the ozone layer, allowing deadly ultraviolet radiation to kill life below. According to APS News, there is a Another theory is that volcanoes are the cause. * Late Devonian Extinction: Over 365 million years ago The Devonian period witnessed the rise and fall of many prehistoric marine species. Although by this time animals had already begun to evolve on land, most of life was swimming through the oceans. Until vascular plants, such as trees and flowers, have the potential to cause a second mass extinction. According to the BBC, as plants develop roots, they inadvertently transform the land they inhabit, turning rocks and rubble into soil. This nutrient-rich soil then runs into the world’s oceans, causing algae to bloom on a massive scale. These blooms essentially created giant “dead zones,” areas where algae take oxygen from the water, suffocating marine life and wreaking havoc on the marine food chain. Species that could not adapt to reduced oxygen levels and lack of food died. However, this theory is still being debated, and some scientists believe that volcanic eruptions are responsible for the drop in oxygen levels in the ocean, according to a study in the journal Geology. A species of sea monster that has been wiped out from the world’s oceans is the 10 m long armored fish called Dunkleosteus . * Permian-Triassic extinction: ~253 million years ago This extinction event is the largest event that has ever occurred on Earth. It wiped out about 90% of all species on the planet and wiped out the reptiles, insects and amphibians that roamed the land. What caused this catastrophic event was a period of rampant volcanism. According to the Sam Noble Museum in Oklahoma, in the ocean, rising levels of carbon dioxide dissolve into the water, poisoning marine organisms and depriving them of their oxygen-rich water. Rising sea temperatures also reduce oxygen levels in the water. Corals are one of the hardest hit groups of marine life – it takes 14 million years for oceanic reefs to rebuild as they once were. * Triassic-Jurassic Extinction: About 201 million years ago The Triassic period was the time when dinosaurs began to inhabit the world. Unfortunately, many volcanoes were also erupting at that time. While it’s still not clear exactly why this fourth mass extinction occurred, scientists suggest that massive volcanic activity occurred in an area of ​​the world now covered by the Atlantic Ocean. cover . Similar to the Permian extinction, volcanoes released huge amounts of carbon dioxide, causing climate change and devastating life on Earth. Global temperatures rise, ice melt, sea levels rise and acidification. As a result, many marine and terrestrial species became extinct; These include large prehistoric crocodiles and several species of flying pterosaurs. All dinosaurs were killed in the fifth mass extinction. Scientists estimate that many species that can fly, burrow or dive into the depths of the ocean survive. For instance, the only true descendants of dinosaurs living today are modern-day birds – more than 10,000 species are thought to have descended from survivors. Is the 6th going? According to The Conversation, scientists define a mass extinction when about three-quarters of species die out in a short geological time, i.e. less than 2.8 million years. Currently, humans are in the early stages of the latest mass extinction, which is happening much faster than any other species. According to the International Union for Conservation of Nature (IUCN), since 1970, populations of vertebrate species have decreased by an average of 68% and now more than 35,000 species are considered threatened with extinction. During the 20th century, as many as 543 species of terrestrial vertebrates became extinct, according to a research paper in the journal PNAS. Since the beginning of the industrial revolution in 1760, humans have been a major factor in Earth’s current environmental crisis. From greenhouse gas emissions and ozone depletion to deforestation, plastic piling and the illegal animal trade, humans have been proactively depriving the world of some species and threatening many others. Ecotourism is an industry that drives conservation efforts around the world, but it is on the verge of collapse since global travel restrictions were introduced. Without tourist income, conservationists are having a hard time protecting vulnerable species from poaching, while the COVID-19 pandemic is intensifying. The New York Times reported. Rhinos in Botswana, feral cats in South America and tigers in India have all been targeted in the past year. In the context of the current pandemic, the wildlife market has become the focus of attention for not only being environmentally irresponsible but also potentially endangering human health through infectious diseases. from animals to humans – such as the COVID-19 pandemic. These markets, which trade in live exotic animals or products derived from them, are found all over the world. For example, bear farms in Asia trap 20,000 Asian black bears for bile, leading to a decline in wild populations. Another potential solution to combat extinction could be the cloning of species. In February 2021, scientists revealed they had successfully cloned a black-footed ferret from an animal that died more than 30 years ago. Native to North America, these small mammals were thought to be extinct until a small colony was found in the early 1980s, where they were engaged in breeding and reintroduction programs. across America. The cloning process is similar to that of Dolly the sheep in the early 1990s.

The Vietnam-China border defense friendship was held for the first time in Quang Ninh province (Vietnam) and Guangxi province (China) in March 2014. This is an activity of great significance in promoting friendly exchanges and cooperation between the army of the two countries as well as border protection forces, local authorities and people in the Vietnam-China border area. . Since 2014 up to now, the next exchange sessions have been organized with a more solemn, practical and in-depth scale in the bordering localities of the two countries. Immediately after the welcoming ceremony, Minister Phan Van Giang went to China, the two sides held talks. The 6th Vietnam-China border defense friendship exchange is co-chaired by the Ministers of Defense of the two countries, including activities taking place in Quang Ninh (Vietnam) and Guangxi (China) provinces. April 24th. Newspaper reporter National Army Following the delegation of the Ministry of Defense of Vietnam will continue to update activities in the framework of the exchange. Minister Phan Van Giang and members of the Vietnamese delegation greeted the milestone of national sovereignty at Mong Cai border gate before going to China to participate in the Exchange. Photo: TRUONG HAI Chinese Minister of National Defense Wei Phuong Hoa presided over the welcoming ceremony of Minister Phan Van Giang. Photo: TRUONG HAI The two ministers performed a landmark salute ceremony at Dong Hung Border Gate. Photo: TRUONG HAI China’s Defense Minister Wei Fenghua painted a mark of sovereignty on the Chinese side. Photo: TRUONG HAI Defense ministers of the two countries took pictures together. The two groups took pictures together before the talks. Minister Phan Van Giang at the conference. The local people saw off the Vietnamese delegation to China to participate in the exchange A large number of reporters from the two countries came to report on the event. Photo: NGOC HUNG

According to Defense World, the US Air Force recently announced blueprints for a new fighter jet being developed under the “Next Generation Aviation Advantage” (NGAD) program, which includes including unmanned and manned fighters.

Design image of 6th generation fighter aircraft of the US Air Force. Source: Sina.

The image shows a triangular flying fighter and its aerial weapons on display as well. The configuration of this fighter is also very different from today’s fighters, the plane is relatively flat, triangular seen from above, has a pair of vertical V-shaped tails and the air intakes located above. fuselage.

The photo shows that this fighter jet has very highly modular characteristics, can quickly replace engines, landing frames … thereby reducing the load of logistics maintenance, missile pods inside. The aircraft is also equipped with a variety of missiles.

The NGAD program was originally proposed as a joint project of the US Air Force and Navy. Although there is still some joint cooperation between the two sides, each side has in turn set up independent offices to research and develop next-generation fighters.

From 2019 to 2025, the budget for the NGAD program of the US Air Force is 9 billion USD, of which the budget for the fiscal year 2021 is 1 billion USD and the budget of the fiscal year 2022 is 1.5 billion USD.

According to the report, the NGAD program aims to complement the F-22 and F-35 fighters, creating a system with multi-domain cognitive capabilities, flexible information and strong operational advantages. air raid attack. The program will apply digital technology to large-scale fabrication and replacement of small components.

This approach is based on the automotive industry’s digital transformation and uses models to solve design, assembly, maintenance and repair issues before, the Air Force said. build a physical system.

The US Air Force report did not specify the cost of the project to build the aircraft. However, the report mentions that a mysterious jet under the project was tested in 2020, and it is still unclear whether the plane is manned or not.

Concept art of a fighter in the NGAD project. Source: Sina.

“We have built and tested a new aircraft and broke all aircraft records,” said Will Roper, Assistant Secretary of the Air Force for US logistics and technology equipment procurement. fight. We are now ready to build the next generation aircraft in an unprecedented way. “

Some previous reports suggested that the NGAD program plane will have an artificial intelligence co-pilot, maybe even the ARTU system (artificial intelligence system built by algorithm to play chess. ).

The artificial intelligence system will act as a support for true pilots, but the weakness of AI systems lies in their logic, while actual military actions may not obey this logic. Human presence is then required to make a decision in unusual, non-standard situations.

It is known that from March 2018, the US Air Force Laboratory has released the image of the next generation F / X aircraft, showing that this aircraft will have a stealth design, eye-catching appearance with laser. High energy capable of cutting enemy aircraft in half.

This is also the main aircraft in the NGAD program, also known as the Penetration Jet. The future F / X aircraft is expected to have longer range and payload, as well as the ability to carry hypersonic weapons.

Under the NGAD program, the US Air Force advocates to exploit advanced capabilities of the new generation of aircraft such as air combat systems linked to fighters, drones and networking platforms. . With the aim of increasing air superiority, the F / X fighter program offers significantly enhanced stealth and works closely in coordination with the drone.

Until now, all information about the capabilities of the F / X is still a military secret. If the program progresses at a rapid rate through streamlined processes and uses current technology, the new generation fighter could join the US Air Force earlier than expected in 2030. .